Contents: Short: 84% Certified Organic Cotton, 9% Nylon, 5% Elastic, 2% Polyester Tall: 82% Certified Organic Cotton, 9% Nylon, 6% Elastic, 3% Polyester To read about the Consumer Products Safety Improvement Act (CPSIA) and how we are complying, please click here. Washing Instructions: Machine Wash Warm, Tumble Dry Low