Amazon.com | Vivobarefoot Primus Trail Knit FG Mens 。Vivobarefoot Primus Trail FG shoes in a versatile black and grey colorway, designed for off-road performance with a firm ground outsole. These barefoot sneakers feature a breathable mesh upper, speed-lace system for a secure fit, and a wide toe box to allow for natural foot splay. The thin, puncture-resistant sole provides excellent ground feel while protecting against rugged terrain. Durable synthetic overlays enhance the structure and longevity of the shoe, making them an ideal choice for trail running or hiking.