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. WaveReflex cobblestone outsole design features reverse action waves made of natural latex rubber for superior flexibility and immediate comfort. Premium full grain or novelty leather mixed with plush nubuck leather uppers. Genuine soft leather lining, luxuriously soft leather socklining, flexible slipper construction. 7mm (approx 1/4") molded rubber heel and outsole provide excellent traction and durability.