The 187 Pro Derby Knee Pad features a Lock-In Core System with removable foam for easy washing and interlocking straps that link the foam to the center of the pad casing. It utilizes V-22 Dual Density Foam, specially formulated for a perfect combination of cushion and protection against multiple hard impacts. The Rapid FLEX Hinge allows the pad to respond freely to a full range of motion, enabling the leg to straighten or bend with little to no resistance. A Fusion Groove Channel maintains foam connection to the skater's leg, helping to eliminate pad slip-downs, and the Lock-In Cap System secures and aligns the removable cap. Additional design elements include a lightweight, fast-drying interior lining, a seamless interior finish for ultimate comfort, ballistic nylon with industrial-weight stitching for durability, three-panel construction, and an open-back design for an excellent fit and quick on/off.