【Soft&Breathable】Our baby sleep sack outer is supersoft, contains 95% rayon made from bamboo and 5% spandex.This fabric is famous for its buttery softness and silky smoothness. | 【Easy Diapering&Roomy space】This sleep sack provide convenience for parents and babies. Smooth 2-way side zipper makes midnight diaper change easily.Hidden zipper can protect your baby's skin.Stretchy roomy space allows your baby to kick and move around freely, but cannot be kicked off.The sleeveless design aid the heat loss and air circulation. | 【Machine washable】The high-quality fabric and reinforced stitching ensure durability. The wider and longer space extend the use time.It can be machine washed and dried at a low temperature.The more you wash it, the softer it gets. | 【Better sleep】This fabric made of bamboo is lightweight, silky, moisture-wicking,providing year-round comfort. | 【Gift &Commitment】This sleep sack with superior quality, unisex color makes it an ideal gift for every little baby. We take great pride in our scientific design, premium materials and expert craftsmanship. If you have any questions or advices, please don't hesitate to contact us.