Amazon.com | Vibram Men。Vibram Men\'s FiveFingers KSO Barefoot Cross-Training Shoe for Balance and Stability size 41 (8.5-9 Men’s). Great condition! BREATHABLE MESH & NYLON UPPER: Constructed with a blend of airy polyester mesh and stretch nylon for a lightweight, well-ventilated feel. This material combination allows for airflow and flexibility during active use and gym sessions. MINIMALIST 3.5MM RUBBER OUTSOLE: Features a thin 3.5mm profile designed for a close-to-the-surface experience. This low-profile construction offers a flexible, lightweight alternative to traditional athletic footwear for various movements. VIBRAM XS TREK WITH RAZOR SIPING: Equipped with a technical XS Trek rubber outsole featuring razor-siped pods. This design is engineered for multi-directional traction on indoor gym floors and packed outdoor trails. ZERO-DROP & FIVE-TOE GEOMETRY: Built with a flat, zero-height platform from heel to forefoot. The signature individual toe pockets follow the foot\'s natural shape, allowing for independent toe separation without additional elevation or arch inserts. SECURE DEBRIS PROTECTION: Designed with a \"Keep Stuff Out\" (KSO) fit featuring a hook-and-loop strap and a snug collar. This specialized closure helps block debris during light hiking and provides a secure, locked-in fit for high-intensity movement.