When it's hot as Hades this is your sock. Coolmax yarns are engineered to move moisture away from your skin, to be fast drying and to enhance comfort. Legendary Darn Tough construction and performance fit assure that socks stay put and in place all day. No slipping. No bunching. No blisters. No hot spots. The perfect amount of cushioning on the foot base provides support and comfort without the bulk. Still made in Vermont. Guaranteed for life. Coolmax - Because wool is not for everyone. We use an exclusive Coolmax blend to create a sock with exceptional softness, durability and superior moisture management. True Seamless - Using the latest generation of Italian knitting machines, Darn Tough are able to knit ultra-light yet extremely dense socks with an undetectable toe seam, here in Vermont. The result is miles and miles (and miles) of blister-free bliss. Feel the difference of feeling nothing at all!