Kicky Pants pajamas are made from 95% bamboo and 5% lycra.   These long sleeve pajamas are made to fit snug.    These are a long sleeve top with long pants set.    Bamboo absorbs water 3-4 times better than cotton, keeping skin comfortable, rather than sticky.  When wearing bamboo your child will stay 2-3 degrees cooler in hot weather and warmer in the cold.  Machine wash cold.