A performance, thin weight knee length waterproof sock designed specifically for MTB (Mountain Biking ) where minimal insulation, maximum breathability are required. 100% waterproof, windproof & breathable – Constructed with our patented Stretchdry technology Added coverage – Knee length sock offers protection higher up the leg Moisture control & comfort – Merino Wool lining Additional ankle support – Elasticated ankle & instep Secure comfortable fit – Y-gore heel construction Prevent rubbing – Hand linked toe closure created flat seam Guard against friction & reduce risk of blistering – Padded heel, toe & footbed 40d-tumble