HP3 technology is a three part comfort system featuring soft foam down the full length of the insole, a memory foam heel pad, and a soft EVA forepart to cushion the foot while you walk. Plush textured leather uppers. Stretch smooth matte satin upper lining for breathability. Luxuriously soft leather socklining, flexible slipper construction. 10mm (approx 1/4") molded rubber outsole provides excellent traction and durability.