4 Pairs Material: 54% Bamboo, 22% Cotton, 16% Polyester, 6% Nylon, 2% Elastane One Size, For Boys 2-3 Years Designed in Britain Machine Wash Not above 40°C or 105°F Low-temperature Drying Do Not Dry Clean, Do Not Iron, Do Not Bleach The Benefits of Bamboo Material: • Sustainable • Antibacterial • Hypoallergenic • Super Soft • Breathable