This Onesie is made of 68% bamboo viscose, 28% cotton and 4% elastane. Use the snaps with caution to prevent any tearing of the fabric! The bamboo viscose in JOF bodysuits and onesies has quick-drying and cooling properties making it remarkably breathable Very soft and comfortable. Feels as soft as cashmere. The fabric wrinkles minimally. The micro-small holes allow the clothing to absorb and evaporate sweat 4 times faster. The clothes don't stick to your skin if it's too hot, your body stays dry so you don't overheat. This Onesie is made of 68% bamboo viscose, 28% cotton and 4% elastane.