Fit: Snug for Sleep Fabric: 96% bamboo / 4% Lycra Wash: Machine was cold, tumble dry low About Bamboo: Bamboo Fabric is naturally antibacterial and moisture wicking, pulling moisture from the skin. Bamboo is naturally insulating, keeping baby cool in summer and warm in winter. Bamboo is hypo-allergenic and perfect for little one's delicate skin. It is also eco-friendly and sustainable.