INSTANT LIFETIME guarantee WITH THIS PRODUCT! Mid weight, mid length waterproof sock perfect for a multitude of activities & conditions where an equal balance of warmth & breathability are required. 100% waterproof, windproof & breathable – Constructed with patented Stretchdry technology Mid weight sock offering the perfect balance of warmth & breathability Moisture control & comfort – Merino wool lining Additional ankle support – Elasticated ankle & instep Secure comfortable fit – Y-gore heel construction Guard against friction & reduce risk of blistering – Padded heel, toe & footbed Prevent rubbing – Hand linked toe closure created flat seam 40d-waterproof