These are premium, fairly-traded, Peruvian pima cotton socks! All styles of Pima socks are custom Pokoloko designs created in collaboration with the entire Poko team's input. Peruvian 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.