Do you have knee pain or want extra preventative support, then a knee gasket might be just what you're looking for. 187 took the classic neoprene and lycra compression gasket design and reworked it for skateboarding. They used thinner neoprene - much thinner than the rest of our gaskets - for the body with a built in donut of slightly thicker compression foam for the patella, and lycra mesh in the curved back. 4-way stretch neoprene with lycra back, recommended to fit snug for best protection.