Vivobarefoot Primus Trail FG 3.5 Mens Insignia Blue/Gum Trainer A natural knitted tongue and

A natural knitted tongue and back heel tab allow your feet easy in and out movement and ultimate comfort

The sandal that launched a thousand minimalist experiments

Always zero drop

Thickness: 9mm

Snow & ice: Move in harmony with one of Nature's harshest biomes

Vivobarefoot Primus Trail FG 3.5 Mens Insignia Blue/Gum Trainer A natural knitted tongue andRun and roam wild Built for trail running and adventuring closer to nature The Primus Trail 3. 5 FG is for runners who live for the end of the road. These all terrain trainers are light and flexible enough to move freely, and tough enough to run wild on rough, rocky ground. Made with recycled, vegan*, high performance materials. We're on a mission to create a fully circular shoe a new Vivo made from an old one, which can in turn be made into another.