Walking in hot weather can cause the foot to perspire and rub. The Sealskinz walking sock stops this by allowing the skin to breathe through milliascopic holes in the Stretchdry membrane.  This is then blended with high quality merino wool and soft feel polypropylene working together to wick sweat and keep the foot dry in hot humid conditions.The lightest and most comfortable walking sock from SealskinzStretchdry technology - waterproof, breathable and windproofNew soft touch polypropylene outer fabricElasticated ankle and insteap - supportive and durableLightweight waterproofing - designed for warm wet dayspolypropylene outer fabric - softer shellY-gore heel - helps with rubbing and is more flexibleHand linked toe closure - creates  flat seam to prevent rubbing