




Vivobarefoot Ultra III Women’s Obsidian Grey
The Vivobarefoot Ultra III Women’s Obsidian Grey is the ultimate amphibious barefoot shoe, built for adventure on land and in water. Combining a minimalist sole with a durable, quick-draining hex design, it offers unmatched freedom and protection wherever your journey takes you.
Key Features
- Amphibious Design: Ideal for use in wet and dry environments—perfect for beach, river, trail, and travel.
- Hex Flex Upper: Open, breathable structure made from durable, water-resistant materials for fast drainage and airflow.
- 3mm Barefoot Sole: Delivers ground feel and natural movement while offering reliable grip and protection.
- Lightweight & Packable: Ultra-light construction makes it easy to carry and perfect for minimalist travel.
- Eco-Friendly Materials: Made using algae-based Bloom® foam to reduce environmental impact.
Performance & Fit
The Ultra III fits true to size and is designed for comfort in and out of water. It offers a sock-like feel, with plenty of flexibility and room to move freely—ideal for hiking, swimming, paddleboarding, or everyday barefoot living.
Care Instructions
- Rinse with clean water after use in saltwater or muddy conditions.
- Air dry completely before storage.
- Do not machine wash or tumble dry.
Why Choose Vivobarefoot Ultra III?
The Ultra III Women’s Obsidian Grey is your go-anywhere, do-anything barefoot shoe—built for versatility, sustainability, and maximum freedom. Whether you're on the trail, in the surf, or exploring city streets, it keeps you grounded and connected to nature.
Get the Right Fit the First Time
We want to make sure you pick the perfect size when ordering online. That’s why we’ve created clear, easy-to-use size charts for every Vivobarefoot product.
Not the right fit? Changed your mind? No worries. Return your gear in unused condition within 365 days for a full refund or store credit — no fuss, no pressure.
Our Size Guide is here to help! Vivobarefoot fit 'big' deliberately – we call this ‘the rule of thumb’. Your toes need wiggle room! This is especially important for running. If you can fit your thumb in-between the end of your toe and the front of the shoe, you’ve more than likely found your ideal size.
**After some time with Vivobarefoot shoes, your shoe size may need to increase, as your toes splay out more naturally.**
WOMENS FOOTWEAR SIZE GUIDE
CM | EU | UK | US |
22.8 | 35 | 3 | 5.5 |
23.5 | 36 | 3.5 | 6 |
24.2 | 37 | 4 | 7 |
24.9 | 38 | 5 | 7.5 |
25.5 | 39 | 6 | 8 |
26.1 | 40 | 7 | 9 |
26.9 | 41 | 8 | 10 |
27.5 | 42 | 8.5 | 11 |
28.2 | 43 | 9 | 11.5 |
Vivobarefoot Ultra III Women’s Obsidian Grey
The Vivobarefoot Ultra III Women’s Obsidian Grey is the ultimate amphibious barefoot shoe, built for adventure on land and in water. Combining a minimalist sole with a durable, quick-draining hex design, it offers unmatched freedom and protection wherever your journey takes you.
Key Features
- Amphibious Design: Ideal for use in wet and dry environments—perfect for beach, river, trail, and travel.
- Hex Flex Upper: Open, breathable structure made from durable, water-resistant materials for fast drainage and airflow.
- 3mm Barefoot Sole: Delivers ground feel and natural movement while offering reliable grip and protection.
- Lightweight & Packable: Ultra-light construction makes it easy to carry and perfect for minimalist travel.
- Eco-Friendly Materials: Made using algae-based Bloom® foam to reduce environmental impact.
Performance & Fit
The Ultra III fits true to size and is designed for comfort in and out of water. It offers a sock-like feel, with plenty of flexibility and room to move freely—ideal for hiking, swimming, paddleboarding, or everyday barefoot living.
Care Instructions
- Rinse with clean water after use in saltwater or muddy conditions.
- Air dry completely before storage.
- Do not machine wash or tumble dry.
Why Choose Vivobarefoot Ultra III?
The Ultra III Women’s Obsidian Grey is your go-anywhere, do-anything barefoot shoe—built for versatility, sustainability, and maximum freedom. Whether you're on the trail, in the surf, or exploring city streets, it keeps you grounded and connected to nature.
Get the Right Fit the First Time
We want to make sure you pick the perfect size when ordering online. That’s why we’ve created clear, easy-to-use size charts for every Vivobarefoot product.
Not the right fit? Changed your mind? No worries. Return your gear in unused condition within 365 days for a full refund or store credit — no fuss, no pressure.
Our Size Guide is here to help! Vivobarefoot fit 'big' deliberately – we call this ‘the rule of thumb’. Your toes need wiggle room! This is especially important for running. If you can fit your thumb in-between the end of your toe and the front of the shoe, you’ve more than likely found your ideal size.
**After some time with Vivobarefoot shoes, your shoe size may need to increase, as your toes splay out more naturally.**
WOMENS FOOTWEAR SIZE GUIDE
CM | EU | UK | US |
22.8 | 35 | 3 | 5.5 |
23.5 | 36 | 3.5 | 6 |
24.2 | 37 | 4 | 7 |
24.9 | 38 | 5 | 7.5 |
25.5 | 39 | 6 | 8 |
26.1 | 40 | 7 | 9 |
26.9 | 41 | 8 | 10 |
27.5 | 42 | 8.5 | 11 |
28.2 | 43 | 9 | 11.5 |
10,000+ Reasons to Give Us a Try
At Adventureco, we stand behind every product we sell. That’s why you’re covered by our 365-Day Return Policy — with free returns within Australia.
Not the right fit? Changed your mind? No worries. Return your gear in unused condition within 365 days for a full refund or store credit — no fuss, no pressure.
Trusted for 9+ years and over 10,000 orders delivered. Shop with confidence, the adventure is guaranteed.