A lightweight and well ventilated insole, designed for activities where both the forefoot and heel are subject to the most impact shock.The Sorbothane Double Strike Insole uses a comfort contour and heel cup in the heel forefoot area, with added shock absorption in the forefoot area, for total impact cushioning as you move. Sorbothane\'s unique viscoelastic material mimics the characteristics of human flesh and absorbs 94.7% of vibrations on impact. An abrasion-resistant top sheet enhances durability whilst wicking away moisture from skin, managing any odour for optimal hygiene and comfort. It\'s designed to replace an existing insole, letting you create the perfect fit by allowing you to trim it down to size in order to match your footwear.