Vivobarefoot Primus Trail Knit FG is a lightweight, barefoot-style trail trainer built for trail running, fastpacking and hiking. It pairs a breathable knit upper and sock-like fit with a Firm Ground outsole and Pro5 puncture-resistant finish for reliable multi-terrain performance. Key attributes: Multicolor | Ocean | Knit textile | Breathable | Puncture resistant | Zonal grip (textured arch) | Lightweight | Multi-terrain traction (wet to dry, concrete to rocky) | OrthoLite insole | Firm Ground outsole | Pro5 puncture-resistant sole layer | Breathable knit upper | Sock-like construction | Foot-shaped toebox | Dimensions & fit: Sole base: 3 mm | Lug height: 2.5 mm | Pro5 puncture layer: 0.8 mm | Foot-shaped toebox (wide fit) | Barefoot feel for natural movement