Vivobarefoot Primus Flow Knit Men’s Barefoot Shoe – Eclipse
Lightweight barefoot performance in a sleek Eclipse finish
The Vivobarefoot Primus Flow Knit combines ultra-light barefoot performance with adaptive, sock-like comfort. The seamless knit upper moves naturally with your foot while staying breathable and secure, and the ultra-thin sole keeps you closely connected to the ground. Built for natural movement, it’s ideal for running, training and everyday wear where flexibility and feel matter most.
Why you’ll love Primus Flow Knit
- Natural barefoot feel: Thin, flexible sole for maximum ground connection and sensory feedback.
- Zero-drop design: 0 mm heel-to-toe drop for natural posture and alignment.
- Breathable knit upper: Seamless 360° knit wraps your foot for a soft, sock-like fit.
- Wide toe box: Foot-shaped design lets toes splay and move freely for better balance and comfort.
- Versatile performance: Equally at home in the gym, on the road, travelling or for everyday wear.
- Sleek Eclipse colourway: Understated, easy-to-style black for work, workouts and weekends.
Key features
- Style: Men’s barefoot performance shoe
- Colour: Eclipse (black)
- Drop: 0 mm (Zero Drop)
- Stack height: ~6 mm total (4 mm midsole + 2 mm outsole)
- Upper: Seamless 360° knit upper (recycled materials) for breathable, sock-like fit
- Footbed: No insole for maximum ground connection
- Fit: Wide, foot-shaped design for natural toe splay
- Best for: Running, training, travel and everyday wear
| Weight | ~128g (per shoe, EU 38) |
| Heel-to-Toe Drop | 0mm (Zero Drop) |
| Stack Height | ~6mm total (4mm midsole + 2mm outsole) |
| Outsole | Primus Flow outsole for flexibility, grip, and ground feel |
| Upper | Seamless 360° knit upper (recycled materials) for breathable, sock-like fit |
| Footbed | No insole for maximum ground connection |
| Fit | Wide, foot-shaped design for natural toe splay |
| Best Use | Running, Training, Travel, Everyday Wear |
Vivobarefoot Men’s Size Chart
Ensure your Vivobarefoot shoes fit just right. Our guide includes accurate size conversions (cm, EU, UK, US), the “rule of thumb” for toe-splay, and easy 365-day returns.
Men’s Footwear Size Guide
| Foot Length (cm) | EU | UK | US |
|---|---|---|---|
| 26.2 | 40 | 6 | 7 |
| 26.9 | 41 | 7 | 8 |
| 27.6 | 42 | 8 | 9 |
| 28.2 | 43 | 9 | 10 |
| 28.9 | 44 | 10 | 11 |
| 29.5 | 45 | 11 | 12 |
| 30.2 | 46 | 11.5 | 12.5 |
| 30.9 | 47 | 12 | 13 |
| 31.5 | 48 | 13 | 14 |
| 32.2 | 49 | 14 | 15 |
The Rule of Thumb
Vivobarefoot deliberately fits larger—your toes need room to splay naturally. If you can fit your thumb between your longest toe and the shoe’s front, you're likely wearing the right size. Over time, as toes spread, you may need to move up a size.
How to Measure Your Feet
- Stand on a hard surface with your heel against a wall.
- Mark the tip of your longest toe and measure to the wall in cm.
- Use the measurement above to choose the corresponding EU/UK/US size.
- Measure both feet and use the longer measurement.
Sizing Tips & Returns
- Vivobarefoot shoes run larger than traditional footwear—don’t worry, this supports natural toe splay.
- If you’re between sizes, we recommend sizing up for comfort rather than over-tight fit.
- Changed your mind? Return unused shoes within 365 days for a full refund or store credit—no questions asked.
Vivobarefoot Primus Flow Knit Men’s Barefoot Shoe – Eclipse
Lightweight barefoot performance in a sleek Eclipse finish
The Vivobarefoot Primus Flow Knit combines ultra-light barefoot performance with adaptive, sock-like comfort. The seamless knit upper moves naturally with your foot while staying breathable and secure, and the ultra-thin sole keeps you closely connected to the ground. Built for natural movement, it’s ideal for running, training and everyday wear where flexibility and feel matter most.
Why you’ll love Primus Flow Knit
- Natural barefoot feel: Thin, flexible sole for maximum ground connection and sensory feedback.
- Zero-drop design: 0 mm heel-to-toe drop for natural posture and alignment.
- Breathable knit upper: Seamless 360° knit wraps your foot for a soft, sock-like fit.
- Wide toe box: Foot-shaped design lets toes splay and move freely for better balance and comfort.
- Versatile performance: Equally at home in the gym, on the road, travelling or for everyday wear.
- Sleek Eclipse colourway: Understated, easy-to-style black for work, workouts and weekends.
Key features
- Style: Men’s barefoot performance shoe
- Colour: Eclipse (black)
- Drop: 0 mm (Zero Drop)
- Stack height: ~6 mm total (4 mm midsole + 2 mm outsole)
- Upper: Seamless 360° knit upper (recycled materials) for breathable, sock-like fit
- Footbed: No insole for maximum ground connection
- Fit: Wide, foot-shaped design for natural toe splay
- Best for: Running, training, travel and everyday wear
| Weight | ~128g (per shoe, EU 38) |
| Heel-to-Toe Drop | 0mm (Zero Drop) |
| Stack Height | ~6mm total (4mm midsole + 2mm outsole) |
| Outsole | Primus Flow outsole for flexibility, grip, and ground feel |
| Upper | Seamless 360° knit upper (recycled materials) for breathable, sock-like fit |
| Footbed | No insole for maximum ground connection |
| Fit | Wide, foot-shaped design for natural toe splay |
| Best Use | Running, Training, Travel, Everyday Wear |
Vivobarefoot Men’s Size Chart
Ensure your Vivobarefoot shoes fit just right. Our guide includes accurate size conversions (cm, EU, UK, US), the “rule of thumb” for toe-splay, and easy 365-day returns.
Men’s Footwear Size Guide
| Foot Length (cm) | EU | UK | US |
|---|---|---|---|
| 26.2 | 40 | 6 | 7 |
| 26.9 | 41 | 7 | 8 |
| 27.6 | 42 | 8 | 9 |
| 28.2 | 43 | 9 | 10 |
| 28.9 | 44 | 10 | 11 |
| 29.5 | 45 | 11 | 12 |
| 30.2 | 46 | 11.5 | 12.5 |
| 30.9 | 47 | 12 | 13 |
| 31.5 | 48 | 13 | 14 |
| 32.2 | 49 | 14 | 15 |
The Rule of Thumb
Vivobarefoot deliberately fits larger—your toes need room to splay naturally. If you can fit your thumb between your longest toe and the shoe’s front, you're likely wearing the right size. Over time, as toes spread, you may need to move up a size.
How to Measure Your Feet
- Stand on a hard surface with your heel against a wall.
- Mark the tip of your longest toe and measure to the wall in cm.
- Use the measurement above to choose the corresponding EU/UK/US size.
- Measure both feet and use the longer measurement.
Sizing Tips & Returns
- Vivobarefoot shoes run larger than traditional footwear—don’t worry, this supports natural toe splay.
- If you’re between sizes, we recommend sizing up for comfort rather than over-tight fit.
- Changed your mind? Return unused shoes within 365 days for a full refund or store credit—no questions asked.
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.
15,000+ 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 15,000 orders delivered. Shop with confidence, the adventure is guaranteed.