Don't let the size fool you, there's a lot of technology packed into these Feetures Unisex Elite Ultra Light Invisible Socks. The Targeted Compression and anatomical design provide an unmatched Custom-Like Fit to prevent blisters. Special iWick Fibers provide durability while wicking away moisture to keep your feet cool and dry. The Higher Heel Tab protects the heel while still staying hidden, and the Heel Hugger Technology adds improved silicone tape placement to prevent slippage. We told you there was a lot packed into these running socks!