Vivobarefoot Primus Trail Flow – Men’s Dark Shadow
Conquer trails with the Primus Trail Flow in Dark Shadow—a barefoot-inspired trail runner combining natural ground feel with durable, eco-conscious design.
Breathable, Sustainable Upper
- 100% recycled polyester mesh provides durability and airflow for active trails.
- Engineered anti-slip lacing ensures a secure fit, even on technical terrain.
Ground-Engaging Outsole
- All-Terrain outsole delivers precise grip with a flexible, ultra-thin platform (1.8 mm sole, 3.5 mm lug depth).
- No insole—as thin as you can get while still offering protection—maximizes barefoot connection.
Barefoot-Driven Design
- Zero-drop layout and minimalist construction encourage natural stride and sensory feedback.
- Streamlined silhouette ideal for fast hiking or mindful trail runs.
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 Dark Shadow
Conquer trails with the Primus Trail Flow in Dark Shadow—a barefoot-inspired trail runner combining natural ground feel with durable, eco-conscious design.
Breathable, Sustainable Upper
- 100% recycled polyester mesh provides durability and airflow for active trails.
- Engineered anti-slip lacing ensures a secure fit, even on technical terrain.
Ground-Engaging Outsole
- All-Terrain outsole delivers precise grip with a flexible, ultra-thin platform (1.8 mm sole, 3.5 mm lug depth).
- No insole—as thin as you can get while still offering protection—maximizes barefoot connection.
Barefoot-Driven Design
- Zero-drop layout and minimalist construction encourage natural stride and sensory feedback.
- Streamlined silhouette ideal for fast hiking or mindful trail runs.
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.
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.
