HJ Hall Protrek Merino Boot Walking Socks Unisex size 9-11 Grey Marl HJ213p. Composition 56% Merino Wool, 44% Polyamide. Engineered comfort toe seam to prevent abrasion and cushioned loops underfoot to offer impact protection and warmth. Merino wool is a durable natural fibre which is both anti-bacterial and has a super soft feel. Offering moisture control and excellent thermal properties these socks will ensure the best environment for your feet in all terrains. These socks have a comfort top with soft elasticated welt grip. TriSeal technology, unique to HJ Hall, to produce a revoluntionary walking sock that provides triple protection helping to seal your feet into the perfect environment. It is a unique treatment added at the final stages of the manufacturing process specifically designed for woollen socks being used in the outdoor environment. Whether tramping through wet grass, dodging puddles or trying to avoid the mud the Tri-Seal application ensure that your feet stay comfortable. 1) Water repellent 2) Moisture Management 3) Stain resistant.