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. Premium soft nubuck uppers, genuine soft leather lining. Luxuriously soft leather socklining with a stud system allowing air to circulate into the layers of foam beneath the foot. Wedge wrapped in a synthetic novelty weave or burnished leather. 85mm (approx 3 1/2'') flexible wedge including a 25 mm (approx 1'') platform. Molded rubber outsole provides excellent traction and durability.