Alpinestars MTB Knee Sock 62%Polyamide 26%Polyester 12%Spandex Light and durable advanced poly-fabric construction is specifically cut for optimizedfit around knee articulation. Offers added levels of comfort and personalized fitto knee guards. Breathable open mesh on back of knee for added ventilation. Elastic edge with silicone grip band maintains a tight fit. Creative graphic pattern The Alpinestars Knee Sock is Lightweight, non-restricting knee sock which contains DuPont KEVLAR fiber to provide an additional layer of protection when used in conjunction with knee guards. Durable stretch Kevlar with elastic mesh at back of the knee for ventilation. Elastic edge with silicone grip band maintains a snug fit. Sleek fit offers constant compression and soft tissue support. Lightweight, nonrestricting knee sock constructed from Kevlar Durable stretch Kevlar with elastic mesh at back of the knee for ventilation Elastic edge with silicone grip band maintains a snug fit Sleek fit offers constant compression and soft tissue support