The Columbia Mens Ravenous Tab performance trail running sock works as hard as your shoe to ease the force of high-impact activities. Featuring the latest in strike-zone cushioning technology, the Ravenous Micro Tab keeps your feet comfy and healthy during impact with thick knit padding that's been anatomically mapped to the way your foot strikes the ground. Made from a soft, super-wicking knit fabric with flex zones in the ankle to prevent hot spots. Mesh-knit vents on the sides match up with vents on our trail running shoes for the ultimate in cool-wearing comfort. The Ravenous Micro Tab sock is outfitted with an anatomical, left/right specific fit so that it can follow every contour of your foot to perfection and the asymmetrical cuff protects the inside of your ankle on from bumps and scuffs.