Cotton,Nylon,Spandex Imported Rock your nerdy side with these Socksmith Caffeine The Molecule socks! Sold as one-pair pack Crew-cut sits at the calf. Athletic ribbed cuffs help keep your socks in place when you’re on the go. Deep heel pocket provides added comfort. Y-stitch heel forms a cup around the heel for added comfort and helps reduce pull down and bunching inside your shoe. Caffeine molecule design. Branding on toe. 63% cotton, 34% nylon, 3% spandex. Machine wash, tumble dry. Imported.