The Seal Skinz Thick Mid-Length Sock not only are they waterproof windproof & breathable they offer great comfort for all outdoor activities from hiking fishing a day of golf or even walking the dog wet feet will be the last of your worries With unique seamless close fitting three layer technology that reduces fiction between foot & shoe providing in-built blister reduction Designed with comfort in mind the Seal Skinz have an elasticated instep & Achilles for added support & padded Merino wool loop pile lining around the heel toes & Achilles making it ideal for all outdoor enthusiast