Vivobarefoot Primus Trail Trainers pair a minimalist, barefoot-inspired design with a thin, grippy outsole for confident movement on trails and firm ground. Key attributes: Gray | Dark grey | Synthetic knit | Outstanding traction on firm ground | Thin, flexible sole for natural foot articulation | Lightweight and agile | Bungee lacing system with toggle | Reinforced toe cap | Heel pull tab for easy on/off | Structured heel counter for subtle support | Seamless, sock-like construction | Hexagonal lug outsole pattern | Subtle branding on side and tongue | Red accent on sole | Dimensions & fit: Sock-like fit that conforms to the foot shape