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Shamma - TrailStars Maximus - Ultragrip (Unisex)

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$189.99
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$189.99
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Waiting on Your Size?

Some Shamma styles and sizes sell out fast. We regularly restock our most popular models. Scroll down to see what’s arriving next and when.

Next Shamma Restock Date

No restock date available currently. You can add your email address to be notified once the size/colour you are after has been restocked.  

Stock is limited and popular sizes tend to sell out quickly once they land.

FREE AUS Shipping for Orders over $250

60 Day Easy Returns & Free Instant Exchanges

Fast, rugged, and built for precision — the Shamma TrailStars Maximus – UltraGrip (Unisex) takes minimalist performance to the next level. Designed for intense activity, these lightweight yet secure sandals excel in both the gym and the great outdoors, offering the stability and comfort you need for speed-driven adventures.

Featuring an 8mm Vibram® Newflex sole with aggressive tread, paired with a weather-ready UltraGrip footbed, the TrailStars Maximus delivers a 9mm total stack height for just the right balance of cushioning and ground feel. The durable Newflex compound blends rubber and EVA for long-lasting performance while diffusing the impact of rocks, sticks, and uneven terrain — even in the harshest conditions.

The TrailStar Lacing System provides unmatched security with an over-the-foot adjustable forefoot strap made from Toray® Ultrasuede and nylon mesh — soft against the skin but as strong as webbing. The heel section features Ultrasuede-covered posts and Velcro® adjustments for a locked-in fit, while a tension lock on the outer heel post allows quick, fine-tuned adjustments.

Features:

  • 8mm Vibram® Newflex sole with aggressive tread for grip and durability

  • 9mm total stack height for balanced cushioning and ground feel

  • UltraGrip footbed for secure traction in wet or dry conditions

  • TrailStar Lacing System for secure, over-the-foot fit

  • Adjustable forefoot strap made from Toray® Ultrasuede and nylon mesh

  • Ultrasuede-covered heel posts with Velcro® strap adjustments

  • Recraftable design — replace worn parts at home

  • Proudly made in the USA with quality global materials

  • Suitable for both men and women

  • Ideal for gym workouts, trail adventures, and high-intensity movement


Specifications

Sole composition and stack height:

8mm Vibram Newflex

1mm UltraGrip or goatskin leather footbed

Total stack height of 9mm.

Weight: Approximately 4.7oz/sandal (at size 9)

SIZING & FIT GUIDE

We strongly recommend using the printable templates to check your foot size to ensure a perfect fit - CLICK HERE to access the Sizing Templates.

NOTE: Make sure your printer doesn’t resize or shrink to fit when printing! Larger sizes will need to be printed Poster across 2 sheets of paper.

To size yourself, print the template out and place your foot on the template so that the toe hole is between your big toe and first little toe. Make sure that your toes aren’t hanging off the front of the template, and that your ankles line up with the ankle slots on the sides of the sandal. If the ankle slots are under your foot a little bit, that’s ok, the laces come up and around your feet – just make sure that your toes don’t go past the front of the sandal, that your heel doesn’t go past the back of the sandal, and that the toe hole and ankle slots line up with your feet. For the best fit, we recommend choosing a sandal size that gives you between 3.2mm to 6.4mm of extra room in front of your toes and behind your heel.

SHIPPING & RETURNS

SHIPPING

We offer FREE Standard Shipping in Australia for Orders over $250

We ship to Australia & NZ using Australia Post.

We offer Standard and Express Shipping options

Our standard shipping rate starts from $9.95, Australia Wide with Authority to leave. 

When you give authority to leave, you are allowing our carriers to leave the package unattended at your address without a signature. Please note if you opt to leave your order unattended, Bprimal will not be responsible for any lost or stolen packages.

You can elect to have your package delivered with a signature on delivery for an additional $2 fee.

Express Shipping is also available from AU$19.95 (2-4 business days)

International Shipping is available to New Zealand from AU$19.95

All orders placed prior to Midday (AEST) will be dispatched the same day (business days Mon-Fri) with the exception of Sale Periods where we may experience up to 3 day delay for dispatch. 

You will receive a tracking number and link to track your delivery once it has been dispatched.

PICK UP IN STORE

We now offer a pickup option from our stores in Neutral Bay, NSW & Northcote, VIC (ONLY for items in stock at the store). *Please note, you cannot order items for pick up and online delivery in the same order - you must select either the 'Pick Up' or 'Ship' delivery option at checkout.

If you selected Pick Up at checkout, you will receive an email notification when your order is ready for collection (usually within 24 hours). Pick up is available during store hours.

International Duties & Taxes — New Zealand

For New Zealand orders over NZD $1,000, import duties and taxes may apply when your order arrives. These charges are set by New Zealand customs and are not included or collected at checkout.

Any duties, taxes, or customs fees are the customer’s responsibility and will need to be paid directly on arrival. Unfortunately, we’re unable to cover or reimburse these charges.

RETURNS

If your order isn’t right for you, you can return it for a refund* or exchange within 60 days of receiving your order. Item must be unworn and in BRAND NEW condition in original box with tags still attached (if applicable). Please note that postage costs to return the item(s) to bprimal remain the customers responsibility with the exception of customers that have purchased our Free Return Guarantee. 

Note: PRELOVED or Items marked as CLEARANCE or are NOT eligible for return

FREE RETURN GUARANTEE 

Australian & NZ customers can elect to include our $1.99 Return Guarantee at checkout, and we will provide you 1x PRE-PAID shipping label if you need to return any items to us for exchange or refund.

SIZE EXCHANGE

Shipping is free for a size exchange (one exchange per order) where we cover the postage to you for the exchange pair. We also offer Instant Exchanges for Australian Customers. 

REFUND

If you are not satisfied with your purchase from bprimal you can return it to us for a full refund minus any postage costs. *Please note that if you have already exchanged your order, you will only be eligible for a store credit if you return the exchange item. Item must be unworn and in BRAND NEW condition.

Care Guide

Keep your barefoot shoes looking fresh and performing their best with a little regular care.

We recommend using our Boom Cleaning Set for easy, effective cleaning. To add an extra layer of protection against water and stains, finish with our Waterproofing Spray.

  • Spot clean with a soft cloth or brush and Boom Cleaning Foam
  • Avoid machine washing or full submersion
  • Let shoes air dry naturally — no heat or direct sun
  • Use a shoe tree or stuff with paper to help keep shape
  • Apply waterproof spray regularly for extra protection

Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
Shamma - TrailStars Maximus - Ultragrip (Unisex)
  • 5 stars: 42 (81%)
  • 4 stars: 9 (17%)
  • 3 stars: 1 (2%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
JLS
Quality: Excellent
Sizing: True to Size
My Feet Feel FREE!!!

I took a while to land on this purchase, after many weeks of research, but I've been really pleased with my final choice. They look presentable enough to wear everyday - (not too 'hikey' looking) - and they're the next best thing to going completely barefoot. I've worn them almost everyday - almost everywhere - since purchasing them a fortnight ago. If I walk a long way on cement paths, I find I need to step off onto the grass for a while, just to cushion my feet a bit. But mostly, I forget I'm wearing any shoes ... my feet feel FREE!

R
Rhonda S.

I love these sandals. They are very comfortable and the straps are lovely and soft. They are very straight forward to set up initially and once I got them exactly right I haven't needed to adjust them at all. Can't wait for the warmer weather!

D
Debbie T.

Lovely wide toebox! Comfortable to walk in.

J
Jasmine P.
Quality: Excellent
Sizing: Small
the service was excellent

the service was excellent. The size I ordered (they run small in my opinion) was too small so I returned them and got a new pair sent straight away. The new size was perfect. I have used them for walking and jogging and they’re great so far. Completely adjustable around the toes and upper feet.

L
Lily M.

My feet are about 25.3cm long and 10cm wide and I’ve found the size M8/W9.5 to be good, though I could also have gone a size up.
These are flexible, adjustable, and great for hiking rocky trails in.
I don’t think they will last very long as after one summer’s wear they are already looking pretty worn out, but they are very comfortable!

M
Matt R.

There are two lacing systems, the newest one allows you trim excess off the length but the supplier doesn't tell you this and may ship the old velcro version.
The ultragrip is for wet weather but the leather one feels better for dry runs.

S
Suze K.

Took a little adjustment to having a loop around my big toes, but they are soft and comfortable. They stay in place over varied terrain. A little wide in the toe box area for my feet, so tripped a bit as I got used to them. Considering getting a Stanley knife onto them to remove a bit of width. My toes have gaps between them so I will never need the extra width as I have medium width feet. Recommend them. Easy to fit too.

G
Gill M.

I love how I feel as though I have bare feet, but don’t worry about tread

R
Robin W.

Lightweight but very comfy. Have worn them in pretty hard and they've seemed to cope well so far

E
Erika F.

Comfortable sandals. True to size chart.
Prompt delivery.

S
Stuart M.

Great experience with bprimal. Hannah provided exceptional customer service! Very happy with the sandals, they are my 3rd pair of Shammas.

R
Ricardo U.

I love these sandals, they’re so comfortable. My only suggestion is to change the material on the insole. When I walk long distances the plastic scratches my feet.
Perhaps next time I’ll try the leather insoles instead.

N
Neal C.

The design is unique and helps hold the sandal to the foot better and once the sole breaks in the trail can be felt underfoot. I bought a similar thin sandal from xeroshoes and its made in china quality had the straps break off from the sandal within a year and into the trash it went.

M
Mireille D.

Finally a sandal wide enough! Flexible, COMfY straps not needing break in period- LOVe!

L
Lacey Q.

I love my shammas! They have the look of chacos and way more comfortable. I’ve gotten several compliments on them. I will continue to purchase.

K
Kimberly S.

These are not my first barefoot shoes, but they ARE my first barefoot sandals. And I have to say, I’m obsessed with them. Each strap area being fully adjustable is so genius and makes the difference between almost comfortable and extremely comfortable. People have also been complimenting me on them unprompted!! I highly recommend these to anyone even sort of interested. I will be a returning customer for other styles, for sure.

C
Claudia P.

I followed the instructions on fitting and the sandals are the most comfortable I’ve ever worn. Looking forward to living in them all summer.

K
Kareem H.

The straps are so supple yet supportive. Being able to get a custom fit on such stylish sandals is a dream. Love them - will definitely buy again.

S
Sofia V.

excellent experience, high quality shoes!

R
Robert L.

While Warriors are my everyday go-to sandal, when I need a little extra protection—wading through rocky stream, hiking over cobbles—the Trailstars offer that extra security and protection while still being very light. Both Trailstars together weigh less than a single sandal of what I used to wear.

K
Kathryn L.

Very streamlined and minimal. I could walk all day in them. Quick to put on and off. Can get the fit just right with all the adjustment points. I got the leather footbed, and they are very grippy even when wet. I wear them walking, out shopping, and traveling (they are very sturdy, and yet all those straps give them more substance and style than a flip-flop, so they are versatile, I only packed these when going on a trip.)
I measured my feet in every way they advised, and also checked sandals I own that fit me good. It was worth it to get a pair that fits me perfectly.
They are not inexpensive, but the price is very reflective of the quality. I'm looking for a reason to buy myself more.

M
Mary P.

I like the slim look. The length was a lot longer than I expected and I trimmed the excess with a band saw.
I have had a problem with the front edge being thin, which sometimes catches on twigs and causes stumbling. I have to be mindful when not walking on flat surfaces

H
Hing Y.

Excellent, excellent, excellent.
Using it wherever possible: walking, running !!!

Loved the ability to customize the strapping for optimum comfort and performance !!!

Already recommended Shamma Sandals for my wellness group.

K
Katherine D.

I am really pleased with how the shoe feels on, it's adjustable straps, the flexibility of the sole, and great traction.
BUT. I have not been able to wear the shoe yet because the straps are too long for my low-ish volume feet, and I can't close the Velcro.

T
Tyler P.

Amazing piece of footwear. Got these as a gift to replace my current minimalist brand. I work from home, mostly at a standing desk, and like to work out in my home gym thruout the day. These sandals fit like a glove and the toe strap is a real game changer. Holds foot perfectly. You can't even tell you have shoes on and the straps hold everything stable for calisthenics, running, lifting, anything.

T
Trina W.

Loving my trailstars so far!

E
Eric G.

I started running about 8 years ago in my late 40's, and transitioned to minimalist footwear a few years into it. I have owned several pair of 5-fingers, some custom made shoes, and a couple different sandals, and I am really impressed with the Trailstar Maximus. The infinite adjustability is amazing, and the leather footbed is crazy comfortable. With just a couple of strap adjustments, my first 5 mile run was comfortable right out of the box. I also own a pair of Warriors with the ultragrip (also a great sandal) but I am really loving these Trailstars so far.

D
Darren G.

I am really impressed with them. I do a lot of barefoot walking and running and these are incredible, I am particularly impressed with the strapping system which keeps sandals very securely attached on the very uneven trails that I run. They were comfortable immediately on a 10 mile hike and on my first 6 mile trail run on steeply angled paths. A great improvement on the Warriors which I loved but these take the whole barefoot feel to another level because they feel so much part of your feet

D
Denny R.

I've had minimal sandals and shoes from most of the top brands. The toe loop and grippy foot bed hold better on wet trails than any I've tried.

🌱 Shamma Footwear specific FAQ's

Why choose running sandals?

Running sandals, also known as athletic sandals, are nothing new—they’ve been around for thousands of years. From marathon-running Greeks to Roman warriors, sandals were once designed for serious movement, not just lounging around.

These days, we’re bringing that natural freedom back. With your feet open to the air, your toes can spread, you sweat less, and you avoid the painful blisters that come with closed shoes. Even better, your feet get to move the way nature intended—supporting your balance, coordination, and whole-body alignment.

Shamma Sandals are crafted to move with you through every adventure—from running and lifting to hiking, kayaking, and even obstacle races. If they’re secure enough for running, you can trust them for just about anything.

I’ve tried other running sandals. What makes Shammas different?

At first glance, a lot of running sandals look alike. But once you slip on a pair, you’ll feel the difference. Shamma Sandals are all about striking the balance—giving you full freedom of movement while keeping your foot locked in and secure.

From high-quality materials (even military-spec thread) to custom machines designed to eliminate hot spots, every detail is crafted for comfort and performance. The result? Sandals so minimal and natural-feeling, you’ll forget you’re even wearing them.

How do I choose the right size?

The size chart for each product shows the sandal length and width of each shoe model (US sizes). We recommend approx 12mm of space in front of your toes (no less than 6mm and no more than 18mm). Refer to our comprehensive Find your Perfect Fit page for guidance on exactly how to measure your feet and choose the right size.

Still not sure? Reach out to info@bprimal.com — the team is always happy to help.

Do you carry women’s sizes?

Shamma Sandals are unisex and use proprietary Shamma Sizing. This makes it easy to find your perfect fit, no matter your foot shape.

Which sandal is right for me?

That depends on where your adventures take you. Each sandal has its own strengths, whether you’re looking for more ground feel, extra grip, or something built for wet conditions. On every product page, you’ll find clear details on the sole, footbed, and lacing system to guide your choice.

Tip: Use the menu to browse sandals by activity—it’s a simple way to find your perfect fit.

Are Shammas only good for running?

Not at all. While they’re amazing for running, they’re built for all kinds of movement and everyday wear. Wear them on a hike, a walk through town, or just to kick back. They’re performance sandals that keep up with your lifestyle.

Can I wear Shammas in wet conditions?

Yes — especially the UltraGrip models, which are waterproof, quick-drying, and ideal for everything from stream crossings to rainy adventures.

Leather editions handle normal foot sweat well, but they don’t love being soaked. Wet leather can feel slippery and may change color, which is totally natural for that material. For full immersion (like swimming or river trekking), pair your sandals with Power Straps for extra hold.

How long does it take to break them in?

Not long. Within a few days, the toe strap will soften, followed by the heel straps and laces. Around the 1–2 week mark, the soles will mould beautifully to your feet, and by 3–4 weeks, they’ll feel like a second skin. Think of it as your sandals “hugging” your feet—like finding your favourite spot on the couch.

Can you feel the toe plug underfoot?

Nope. Toe plugs are counter-sunk and sit flush with the sole, so you won’t notice them. The only exception is with Warriors soles, where you might feel the plug briefly during break-in. Once the sole forms around your foot, it blends right in.

Are the soles protective?

Yes — they protect while still giving you that barefoot ground feel. The Warriors sole offers the most natural connection to the ground, while the TrailStar Omega sole provides the most protection. Over time, the sole moulds to your unique footprint for a custom fit.

Will the laces wear out if they touch the ground?

Not at all. Shamma laces are built tough and last as long as the sandal (and usually beyond). Even if they graze the ground, they won’t wear through thanks to the way the sole lifts and protects them.

How do I care for my Shamma Sandals?

They’re made to last, but a little care keeps them happy:

  • UltraGrip sandals: Wash with cool water and mild soap if needed. Air dry away from direct heat, sunlight, or steam.
  • Leather sandals: Use a suitable Leather Cleaner + Conditioner for the best results.

Tip: Avoid leaving your sandals in extreme conditions (intense heat, cold, or moisture). They’re fine on your feet during adventures, but storing them in harsh conditions can damage their shape or materials.

Are Shamma sandals vegan?

All UltraGrip top models are vegan. Just look for the UltraGrip footbed option when choosing your pair.

What Is There Is A Problem With My Shoes?

We always look to be reasonable and fair in resolving any problem you have with our products. Please email info@bprimal.com with your order number and photos.