- The true workhorse of the DeFeet wool posse, the versatility of the Woolie Boolie is mind boggling - from riding to running to kayaking to sleeping in them. These socks keep you warm. The Merino Wool and Lycra combination keep them close to the foot for extra warmth and softness while the full terry cushion under padding and an open AirEator weave over top increase breathability to keep feet dry and warm.
