Fit & Design: Unicorn 3-D Spacer Knit helps provide cushion Designed with support and breathability around high-pressure areas such as the toe, heel and ball of the foot Also helps provide support at the back of the heel and activates a wrapping sensation to help your foot feel locked in The patented Circular Split Heel provides staying power that hugs your heel and helps to minimize slippage Patented 360 Toe Lock helps keep the sock in place so you can focus on your sport or your workout Technology: Nike Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable Additional Details: Machine washable