187 Killer Pads Pro Knee V-22 Dual Density Foam - Specially formulated to provide the perfect combination of cushion and protection for multiple hard impacts 187 Killer Pads Lock-In Cap System - Secures and aligns removable cap in correct position note : x small does not have a replacable cap Proven 187 Killer Pads Design Elements - Light-weight fast drying interior lining - Seamless interior finish for ultimate comfort - Ballistic nylon with industrial-weight stitching ensures durability - Three-panel construction