DEFEET Woolie Boolie 6 D-Logo Black Socks 2016 stay cooler in the heat because of the construction of the mesh warmer when they are wet and in cooler temperatures because of the amazing thermal properties 64% Wool, 34% Nylon, 2% Lycra Use the Wooleator to run, walk, hike, ride bikes, or relax at home Machine wash cold, tumble-dry low, no chlorine bleach.