These take your sock game to the next level by being light and breathable, but still giving you arch support. Fit & Design: Hidden, no-show design with ultra-thin, lightweight construction for a barely there feel New Locked-In Fit design keeps sock securely on heel for an adjustment free fit that won't fall down Front comfort tab protects top of foot from lace bite & irritation Interior no-slip silicone grips on back of heel helps keep your socks from sliding down Odor control technology reduces odor in the sock Material wicks sweat & dries really fast Fitted heel contours around foot for a better fit 6 pairs per pack