Product Description The baby deedee sleep nest is a quilted wearable duvet blanket for babies 0-36 months. Designed in a comforting cocoon-like shape to help baby feel cozy and secure, it's the perfect transition from the womb or swaddling stage. Unique shoulder snaps make it easy to place baby into the sleep nest, even while sleeping, in just 2 easy snaps. Small is suitable for babies 0-6 months and 10-18 lb. Medium is suitable for babies 6-18 months and 16-26 lb. Large is suitable for babies 18-36 months and 25-35 lb. Winter weight TOG 2.5 From the Manufacturer The Baby deedee sleep nest is a quilted wearable duvet blanket for babies and toddlers 0-36 months. Designed in a comforting cocoon-like shape to help baby feel cozy and secure, the sleep nest's 3 sizes will keep your baby comfy at night from the newborn stage until she is ready to move out of the crib. Unique shoulder snaps make it easy to place baby into the sleep nest, even while sleeping, in just 2 easy snaps.