Made from high-quality urethane, Arius Butterfly Cushions retain energy and release it when you need it most. Designed specifically for the revolutionary Arius Red plate and Arius NTS plate, the patented design of the Butterfly Cushion provides Progressive Lateral Movement, creating efficient pressure while eliminating stress points found in traditional roller skate plates. Packaged in a compact durable tin, these cushions are available for replacement or adjustments. Each tin contains a full set of four Butterfly cushions and has a color coded label on the back.