Vivo Barefoot Primus Trail FG 3.5 Men's Trail Shoes

Built for runners who thrive beyond the beaten path, the Primus Trail 3.5 FG is a lightweight, flexible trail-running shoe designed to tackle everything from rocky tracks to firm, fast-moving terrain. Combining durability with natural movement, it delivers the grip, ground feel, and freedom needed to explore with confidence.

The latest evolution of the Primus Trail range, the 3.5 FG has been developed with both performance and circularity in mind. Constructed using high-performance recycled and vegan materials, the shoe features a redesigned upper with a significantly increased polyester content, helping move closer to a future where old shoes can be transformed into new ones.

Features

• Multi-Terrain Outsole – Provides dependable grip and ground feel across wet and dry, rocky and firm terrain.
• Lightweight Construction – Designed for unrestricted movement and long-lasting comfort on the trail.
• Flexible Barefoot Design – Supports natural foot movement, balance, and agility.
• Firm Ground (FG) Traction – Built to perform on a wide variety of outdoor surfaces.
• Fit, Feel, Flex – Promotes natural stability, sensory feedback, and foot strength through barefoot-inspired design.
• Foot-Shaped Fit – Allows toes to splay naturally for enhanced comfort and control.

Materials & Sustainability

• High-Performance Recycled Upper – Redesigned upper construction increases polyester content from 34% to 76%, improving sustainability while maintaining performance.
• 93% Recycled Polyester Content – The polyester used within the upper is made from 93% recycled materials, reducing reliance on virgin resources.
• Vegan-Friendly Construction – Made without the use of animal-derived materials.
• Mechanically Recyclable Outsole – Features an outsole designed to be mechanically recycled as part of Vivobarefoot's circular footwear initiative.