The KP250 Centurion Knee Pads feature half-inch, high-density foam, covered in durable Cordura nylon for durability. The polyurethane thermoplastic nonslip caps with color-keyed grommets provide additional shock absorption and ensure long-lasting wear in the field. Dual hook and loop fastened 1.5 in. (3.8 cm) wide elastic straps with reinforced bar tacking provide a comfortable and secure fit. One size fits all.