Merino Sock Winter Black Reinforced heel and toe Soft grip cuff Elasticated leg Cushioned foot sole Ventilation channels Portwest Winter Merino Sock - Black- Size 39-43 | Sk34bkr39-43 Keep your feet warm for longer with Winter Merino Socks finished in Merino wool. Reinforced heel and toe for excellent durability. Soft grip cuff, comfort toe seam, elasticated leg, cushioned foot sole and ventilation channels. Material Upper: 65% Wool, 35% Nylon