A DeFeet favorite, the Woolie Boolie is padded throughout the footbed and on the cuff. Made from an American Merino wool blend, these socks will keep you warm in any season without getting too hot in mild weather. Wool has naturally antibacterial properties, so it takes a lot of sweaty abuse to make a Woolie Boolie stink. Wool also repels moisture, so the socks stay warm and dry in all kinds of weather. As a thicker sock, the Woolie Boolie has a mid-density padded fit profile for the rigors of mountain biking and endurance for hiking. Thickest DeFeet sock; less compression than the Wooleator.