Special CLC Comfort Zone gel center provides maximum cushioning for all day wearability Crafted from 1680D Ballistic nylon and 3/4in. foam for increased comfort Breathable Neoprene lower straps secure below the knee for comfort all day long Elastic upper straps with buckle-style fasteners for rapid fit Large. Low profile cap designed to prevent roll-over onto hard surface KNEEPADS PROFESSIONAL GEL NYLON is one of many Knee Pads available through Office Depot. Made by CLC Custom Leather Craft.