Vivobarefoot Primus 3.5 FG Running Shoe – Men's size-10 250 g/m² fabric: 73% Climate

250 g/m² fabric: 73% Climate Conscious U

not so much you're swimming in fabric

Low-volume

warm enough for a cold bivvy

keeping feet dry during high-output winter activity

Vivobarefoot Primus 3.5 FG Running Shoe – Men's size-10 250 g/m² fabric: 73% ClimateBuilt for runners who want real ground feel on technical terrain, the Primus Trail 3. 5 FG is our pick for athletes transitioning to or training in barefoot footwear. A firm ground outsole with aggressive lugs delivers traction on dirt, roots, and rock, while the wide toe box lets your foot splay and work naturally. Zero drop, minimal stack height puts you in direct contact with the trail for honest proprioceptive feedback Firm ground (FG) outsole