Exclusive Bi-Layer Comfort System For Superior Support And Comfort, Top Layer: Moisture-Wicking With Both Cooling And Thermal Insulating Properties, Bottom Layer: Poron® Cushioning Absorbs Impact, Resists Water, And Conforms To The Leg For Comfort, Protective Polyurethane-Coated Leather Resists Weathering, Water Absorption And Cracking, One Size Fits Most, Sold In Pairs, Includes Metal Inserts, Poron® Is A Registered Trademark Of Rogers Corp