From our friends at In My Jammers....Made from incredibly soft viscose from bamboo, this pajama set is lightweight, breathable, and gentle on sensitive skin. The stretchy, snug fit keeps kids comfortable through bedtime routines, sleep, and slow mornings at home. Why moms love Tulip Fields set Ultra soft and breathable viscose from bamboo Gentle on sensitive and eczema prone skin Stretchy fabric that moves easily with kids Snug fit for safe and comfortable sleep Bright lemon gingham print that feels happy and timeless Product Details: Extremely soft and stretchy 95% viscose from bamboo; 5% spandex Machine wash cold and tumble dry low No interior tags Not treated with flame retardants Designed with a snug fit to meet all CPSC safety standards. We never use flame-retardants or harsh chemicals. For your child’s safety, this garment is meant to snug to the body and is not flame resistant.