The Primus Trail II Firm Ground is our original, best-selling trail-running sneaker. It’s light, durable and flexible for wide-ranging trail adventures that bring you closer to the earth.
Continuously improved through athlete testing and material innovation, the Primus Trail II FG has nothing more or less than exactly what you need – made with high-performance, recycled, vegan* materials.
FIRM GROUND OUTSOLE
Stand firm on multiple terrains.
ORTHOLITE INSOLE
The Active Ortholite Performance Insole is made of 98% recycled PU foam, which helps reduce waste and the use of virgin plastics.
VEGAN*
*The main materials in all our Vegan* products are synthetic and aren’t derived from animals. We don’t (yet) have the transparency we need over the production of all the small components (such as adhesives and dyes) used in these products to ensure they meet vegan best practices. So, whilst we believe the shoes are vegan, we’re not yet able to guarantee it and want to be fully transparent.
BREATHABLE MESH
Breathable, lightweight and comfortable.
PUNCTURE RESISTANT
The Pro5 Puncture Resistant finish is a lightweight and flexible 0.8mm layer on the sole. Protective underfoot to keep painful bits out, but still letting all the feeling in.
WEIGHT
Based on a single shoe in Women's size: EU 38 | UK 5 | US 7.5
220g
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.**
MENS FOOTWEAR SIZE GUIDE
| 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 Primus Trail II Firm Ground is our original, best-selling trail-running sneaker. It’s light, durable and flexible for wide-ranging trail adventures that bring you closer to the earth.
Continuously improved through athlete testing and material innovation, the Primus Trail II FG has nothing more or less than exactly what you need – made with high-performance, recycled, vegan* materials.
FIRM GROUND OUTSOLE
Stand firm on multiple terrains.
ORTHOLITE INSOLE
The Active Ortholite Performance Insole is made of 98% recycled PU foam, which helps reduce waste and the use of virgin plastics.
VEGAN*
*The main materials in all our Vegan* products are synthetic and aren’t derived from animals. We don’t (yet) have the transparency we need over the production of all the small components (such as adhesives and dyes) used in these products to ensure they meet vegan best practices. So, whilst we believe the shoes are vegan, we’re not yet able to guarantee it and want to be fully transparent.
BREATHABLE MESH
Breathable, lightweight and comfortable.
PUNCTURE RESISTANT
The Pro5 Puncture Resistant finish is a lightweight and flexible 0.8mm layer on the sole. Protective underfoot to keep painful bits out, but still letting all the feeling in.
WEIGHT
Based on a single shoe in Women's size: EU 38 | UK 5 | US 7.5
220g
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.**
MENS FOOTWEAR SIZE GUIDE
| 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 |