INSTANT LIFETIME guarantee WITH THIS PRODUCT! Thick weight, mid length waterproof sock perfect for a multitude of activities & conditions where added insulation is imperative. 100% waterproof, windproof & breathable – Constructed with patented Stretchdry technology Thick weight sock providing warmth in the coldest of conditions Moisture control & comfort – Thick Merino Wool lining Added support & comfortable fit – 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