Vivobarefoot Primus Trail Flow Men’s Barefoot Trail Shoe – Storm Cloud
Lightweight barefoot freedom for fast, technical trails
The Vivobarefoot Primus Trail Flow is a lightweight, high-performance barefoot trail shoe built for moving naturally across varied terrain. With a breathable recycled mesh upper and a grippy, low-profile outsole, it delivers strong ground feel while keeping you agile and secure. Designed for responsive movement, it’s ideal for trail runs, hikes and off-road exploration where connection and control matter.
Why you’ll love Primus Trail Flow
- Natural barefoot feel: Thin, flexible sole for maximum ground connection and sensory feedback.
- Zero-drop design: 0 mm heel-to-toe drop supports natural posture and balance on uneven terrain.
- Trail-ready grip: Durable rubber outsole with multi-directional lugs for traction on wet, dry and loose surfaces.
- Breathable and recycled: 100% recycled polyester mesh upper keeps feet cooler while reducing impact on the planet.
- Foot-shaped freedom: Wide toe box lets toes splay naturally for better stability and comfort on the trail.
- Secure lockdown: Anti-slip lacing system helps keep your foot locked in over technical ground.
Key features
- Style: Men’s barefoot trail running and hiking shoe
- Colour: Storm Cloud (grey)
- Drop: 0 mm (Zero Drop)
- Stack height: ~3 mm sole for maximum ground feel
- Upper: Breathable 100% recycled polyester mesh
- Outsole: Durable rubber with multi-directional lugs for off-road grip
- Fit: Wide, foot-shaped design for natural toe splay
- Closure: Secure lacing system with anti-slip design
- Best for: Trail running, hiking and off-road adventures
| Weight | ~240g (per shoe, size dependent) |
| Heel-to-Toe Drop | 0mm (Zero Drop) |
| Stack Height | ~3mm sole for maximum ground feel |
| Outsole | Durable rubber outsole with multi-directional lugs for grip |
| Upper | Breathable 100% recycled polyester mesh |
| Fit | Wide, foot-shaped design for natural toe splay |
| Closure | Secure lacing system with anti-slip design |
| Best Use | Trail Running, Hiking, Off-Road Adventures |
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 Trail Flow Men’s Barefoot Trail Shoe – Storm Cloud
Lightweight barefoot freedom for fast, technical trails
The Vivobarefoot Primus Trail Flow is a lightweight, high-performance barefoot trail shoe built for moving naturally across varied terrain. With a breathable recycled mesh upper and a grippy, low-profile outsole, it delivers strong ground feel while keeping you agile and secure. Designed for responsive movement, it’s ideal for trail runs, hikes and off-road exploration where connection and control matter.
Why you’ll love Primus Trail Flow
- Natural barefoot feel: Thin, flexible sole for maximum ground connection and sensory feedback.
- Zero-drop design: 0 mm heel-to-toe drop supports natural posture and balance on uneven terrain.
- Trail-ready grip: Durable rubber outsole with multi-directional lugs for traction on wet, dry and loose surfaces.
- Breathable and recycled: 100% recycled polyester mesh upper keeps feet cooler while reducing impact on the planet.
- Foot-shaped freedom: Wide toe box lets toes splay naturally for better stability and comfort on the trail.
- Secure lockdown: Anti-slip lacing system helps keep your foot locked in over technical ground.
Key features
- Style: Men’s barefoot trail running and hiking shoe
- Colour: Storm Cloud (grey)
- Drop: 0 mm (Zero Drop)
- Stack height: ~3 mm sole for maximum ground feel
- Upper: Breathable 100% recycled polyester mesh
- Outsole: Durable rubber with multi-directional lugs for off-road grip
- Fit: Wide, foot-shaped design for natural toe splay
- Closure: Secure lacing system with anti-slip design
- Best for: Trail running, hiking and off-road adventures
| Weight | ~240g (per shoe, size dependent) |
| Heel-to-Toe Drop | 0mm (Zero Drop) |
| Stack Height | ~3mm sole for maximum ground feel |
| Outsole | Durable rubber outsole with multi-directional lugs for grip |
| Upper | Breathable 100% recycled polyester mesh |
| Fit | Wide, foot-shaped design for natural toe splay |
| Closure | Secure lacing system with anti-slip design |
| Best Use | Trail Running, Hiking, Off-Road Adventures |
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.