Best for: Soft and stretchy for everyday comfort. In our lightweight, breathable Air fabric, these boxers are your go-to in hot weather or for exercising... Our fabric: Light as air and naturally cool, our Air fabric is a nature-based, breathable blend of bamboo viscose and organic cotton with just the right amount of stretch... Easy care - Machine Wash at 30. 68% Bamboo Viscose, 28% Organic Cotton, 4% Elastane.. Please note: For hygiene reasons, underwear cannot be returned unless faulty. Colour: black