Extra-thick cushioning with memory foam for lasting comfort. Molds to the unique shop. of your foot. Cooling vents keep feet dry. Top layer of foam molds to the unique shape of your foot. Delivers personalized cushioning where you need it most. Bounces bock time after time for long-lasting comfort. Bottom layer of stabilizing foam - Helps stay in place with less wrinkling and bunching - Provides better support and cushioning. Absorbs shock. Product contains natural rubber latex.