Swaddle Up 3.5Tog Quilted Stretch CottonA patented, game changing design, the Swaddle Up makes longer sleep easy. The more natural Arms Up position lets babies access their hands to self soothe. Unique patented wings allow natural ARMS UP position ARMS UP allows true SELF SOOTHING = more sleep Swaddle in seconds with no breakouts Twin zipper for easy nappy changes No loose layers to kick off during sleep Acknowledged as a hip healthy product by the International Hip Dysplasia Institute;