Targeted Compression and anatomical design provide an unmatched Custom-Like Fit. This, paired with silicone Heel Hugger technology, gives stay-up confidence in low-rise shoes. Targeted compression provides zone-specific compression where you need it most for superior fit and support Anatomical design conforms to left and right structure of the foot providing enhanced fit and reduced risk of blisters iWick fibers wick moisture to keep feet cool and dry Our thinnest option provides a lighter, cooler feel Heel Hugger technology - a band of high quality, self-fusing silicone tape keeps sock from slipping inside shoe Now made with Repreve, yarn made from recycled plastic. | Feetures Men's Everyday No Show Socks in Black | Size: Large | Fit2Run.