Hit the trail to rewild yourself and reconnect with nature. The Primus Trail 3.5 FG is a light, durable, flexible trail-running trainer that brings us one step closer to circular footwear.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. BREATHABLE MESH Breathable, lightweight and comfortable. WEIGHT Based on a single shoe in Women&';s size: EU 38 | UK 5 | US 7.5