Elastomer with an isothermal approach. Thick copolymer foam, closed high density. Large square of high-quality technical gel injected into a honeycomb structure. 1680-denier nylon fabric. Comfort version: sole with independent slats to secure the knee to the ground on any surface. The middle rubber is non-slip, and the translucent sole does not mark the floor. Quick clip fastening - more convenient cross fastening.