Take on any adventure in the award winning, best all around Merrell sock. Its midweight construction plus vents for breathability make it comfortable for every adventure. Midweight construction plus breathability for every adventure. Enhanced with sustainable Coolmax® EcoMade moisture management technology and friction-reducing yarn that you will love for your everyday. Features CoolMax® EcoMade technology provides sustainable, moisture management to keep feet dry Friction-reducing yarn technology in the heel and toe to prevent blisters and add durability Arch band support to fight fatigue Extended zoned cushion through back of ankle, heel and toe Smooth toe closure for comfort Deep heel pocket to prevent the sock from slipping into your shoe, ensuring the perfect fit and no-slip security Fabric: 88% Coolmax® EcoMade Polyester/10% Nylon/2% Lycra® Spandex Size indicator knit inside top of sock