Sealskinz is a reliable choice for anyone looking for waterproof socks or gloves. The brand has decades of experience, and its products have been refined over the years into something truly excellent. In this sock model the merino wool content is fairly high, and the other fibre, acrylic, has been chosen for its thermal propertiesa good choice for cold conditions where you also want to protect your feet from water. - Outer material: durable polyamide knit - Aquashield membrane in the middle - Next to the skin: 50% merino wool / 50% acrylic blend - S = 3638 - M = 3942 - L = 4346