XOAB Cobalt Strata Socks - Cotton 70% Extra Long Staple Supima&reg; Cotton / 25% Nylon / 5% Spandex Made in USA Color blends inspired by layered rock formations Designed for comfort with a perfectly smooth toe seam, a little extra spandex for a perfect fit and 200-needle quality for fine pattern detail and an ultra-smooth feel Elastic arch band, taller heel, and nylon reinforcing for wear resistance Each pair comes in an embossed gift box, made from 100% post-consumer-recycled materials Sizes: Regular fits US Men's shoe size 5-11 and Women's 6-12; Large fits Men's up to 14