Pokoloko Pima Socks 2-PackPeruvian pima cotton is hand harvested, which means the production process has a much reduced impact on the environment compared to a machine based harvesting production process. It is hypoallergenic for those with sensitive skin, and it's breathable and moisture wicking for those active sock lovers. S M: wmns 5 9 mens: 4 8. 5 L XL: wmns: 9. 5 12 mens: 9 14 80% pima cotton, 15% nylon, 5% spandex