Offering lightweight performance, the Smartwool PhD Outdoor Light Crew Socks are dedicated to lasting comfort. Made with Indestructawool technology, the socks are highly durable, with high stretch capabilities for an increased range of movement. Vented zones allow for increased breathability, with light underfoot cushioning for longer days on the hill. A technical performance sock from SmartwoolIndestructawool technology - patented construction method supplies lasting durability and unrivalled comfort4-degree elite fit system - uses a blend of elastics for full stretch performanceMesh venting - specially designed zones allow for increased breathabilityLight cushioningWeight: 56% merino wool, 41% nylon, 3% elastaneRecommended activity - walking / hiking / casual