Vivobarefoot Hydra ESC Women's Barefoot Swimrun Shoe – Obsidian/Safety Yellow
Swim and run wild. The Vivobarefoot Hydra ESC Women's in Obsidian/Safety Yellow is built for wild runners, swimmers, and swimrunners seeking a deep connection with the aquatic environment. Part of the Ecological Survival Collection, it drains and dries rapidly, stays light when wet, and grips even the slickest technical trails.
Features
- Michelin® ESC outsole — extreme traction for extreme off-trail terrain
- RISE foam insole made with excess algae biomass — hydrodynamic and eco-conscious
- Quick-lock lacing for easy on-the-move adjustments
- Fast-draining, quick-drying materials — stays lightweight when wet
- Wide toe box for natural toe splay
- Zero-drop sole for natural posture
- Women’s fit
- Obsidian/Safety Yellow colourway
Specs
- Colour: Obsidian/Safety Yellow
- Outsole: Michelin® ESC, zero-drop
- Insole: RISE foam (algae biomass)
- Best use: Swimrun, trail running, amphibious adventure
- Fit: Women’s
- Brand: Vivobarefoot
About Vivobarefoot
Vivobarefoot designs footwear that reconnects people with natural movement. Built wide, thin, and flexible, every shoe is designed to strengthen feet and restore the natural barefoot experience.
Vivobarefoot Women’s Size Chart
Ensure the perfect fit with your Vivobarefoot shoes. Our guide provides accurate size conversions (cm, EU, UK, US), the “rule of thumb” toe-room tip, and flexible 365-day returns.
Women’s Footwear Size Guide
| Foot Length (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 |
The "Rule of Thumb" Fit Tip
Vivobarefoot intentionally fits larger to give your toes room to wiggle—especially important for natural movement. If you can comfortably fit your thumb between your longest toe and the shoe’s front, you’ve likely found the right size. Over time, as your toes naturally splay, you may need to go up a size.
How to Measure Your Feet
- Stand with your heel against a wall on a hard surface and measure from wall to tip of your longest toe in centimeters.
- Use the “cm” column above to determine your size.
- Measure both feet and base your choice on the larger measurement.
- Measure at the end of the day when your feet are slightly larger.
Sizing Advice & Return Policy
- Vivobarefoot fits liberally—don’t size down to compensate. A bit more room means better barefoot feel.
- If you're between sizes or plan to wear thick socks, consider sizing up for lasting comfort.
- Not completely sure? You have a full 365 days to return unused shoes for a refund or store credit—stress-free returns.
Vivobarefoot Hydra ESC Women's Barefoot Swimrun Shoe – Obsidian/Safety Yellow
Swim and run wild. The Vivobarefoot Hydra ESC Women's in Obsidian/Safety Yellow is built for wild runners, swimmers, and swimrunners seeking a deep connection with the aquatic environment. Part of the Ecological Survival Collection, it drains and dries rapidly, stays light when wet, and grips even the slickest technical trails.
Features
- Michelin® ESC outsole — extreme traction for extreme off-trail terrain
- RISE foam insole made with excess algae biomass — hydrodynamic and eco-conscious
- Quick-lock lacing for easy on-the-move adjustments
- Fast-draining, quick-drying materials — stays lightweight when wet
- Wide toe box for natural toe splay
- Zero-drop sole for natural posture
- Women’s fit
- Obsidian/Safety Yellow colourway
Specs
- Colour: Obsidian/Safety Yellow
- Outsole: Michelin® ESC, zero-drop
- Insole: RISE foam (algae biomass)
- Best use: Swimrun, trail running, amphibious adventure
- Fit: Women’s
- Brand: Vivobarefoot
About Vivobarefoot
Vivobarefoot designs footwear that reconnects people with natural movement. Built wide, thin, and flexible, every shoe is designed to strengthen feet and restore the natural barefoot experience.
Vivobarefoot Women’s Size Chart
Ensure the perfect fit with your Vivobarefoot shoes. Our guide provides accurate size conversions (cm, EU, UK, US), the “rule of thumb” toe-room tip, and flexible 365-day returns.
Women’s Footwear Size Guide
| Foot Length (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 |
The "Rule of Thumb" Fit Tip
Vivobarefoot intentionally fits larger to give your toes room to wiggle—especially important for natural movement. If you can comfortably fit your thumb between your longest toe and the shoe’s front, you’ve likely found the right size. Over time, as your toes naturally splay, you may need to go up a size.
How to Measure Your Feet
- Stand with your heel against a wall on a hard surface and measure from wall to tip of your longest toe in centimeters.
- Use the “cm” column above to determine your size.
- Measure both feet and base your choice on the larger measurement.
- Measure at the end of the day when your feet are slightly larger.
Sizing Advice & Return Policy
- Vivobarefoot fits liberally—don’t size down to compensate. A bit more room means better barefoot feel.
- If you're between sizes or plan to wear thick socks, consider sizing up for lasting comfort.
- Not completely sure? You have a full 365 days to return unused shoes for a refund or store credit—stress-free returns.
WHY GO BAREFOOT
Wearing Vivos for 6 months increases foot strength by 60%
Better Balance and Posture
Foot-shaped fit enables toes to splay supporting balance and a stable base of support.
Improved Coordination And Agility
Thin sole allows the thousands of nerve endings in each foot enabling the sensory feedback the brain needs to move with skill.
Improved Strength and Natural Movement
Flexible footwear let the muscles and tendons load and recoil, supporting stronger, more resilient feet over time.
20,000+ 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 10+ years and over 20,000 orders delivered. Shop with confidence, the adventure is guaranteed.