This wonderful set will keep your little one comfy and dry, and looking ever so cute! These pajamas are not treated with flame retardant, and fit snugly to ensure baby's safety. The side benefit is that they do not twist around like pajamas with excess fabric, keeping baby comfortable during the various positions of sleep! Made of 95% Bamboo and 5% Lycra, our Bamboo basic pull on pants are incredibly soft and luxurious. Bamboo is an eco-friendly, sustainable crop that grows wild without the aid of fertilizers or pesticides. Bamboo fabric is naturally antibacterial, antifungal and antistatic and absorbs water 3 to 4 times better than cotton. This keeps your baby's skin cool and comfortable, rather than sticky, in warmer weather.