GRÜNDL Hot Socks Lago Yarn – 4-Ply Superwash Wool, Durable & Easy-CareGruendl Hot Socks Lago, 4 ply sock yarn Description durable, machine wash sock yarn very firm sock yarn due to 4 fold twist, producing very durable socks the fibre is "superwash" and can therefore be washed easily in the washing machine at 40 C on delicate cycle; the sock yarn does not become matted. "superwash" means that the wool does not become matted due to the chemical procedure. In the process, the scales of the wool are partially detached,