Designed for babies with existing Hip Dysplasia. With a wider fit to be worn over Hip Dysplasia harness or brace Patented Arms UP design replicates your baby's natural sleeping position, allowing them to self-soothe and helps to reduce the startle reflex Nappy changes have never been easier! The double zip eliminates the need to remove the swaddle during the night shift Hip-healthy design does not restrict your baby’s legs or hips, allowing them to lie in a natural position Designed for babies 1-3 months, 3.5kg-6kg or up to 25in long Created especially for babies with existing Hip Dysplasia (for use with a Pavlik Harness, Denis Browne Bar (DDB) and Rhino Brace). Designed with a wider fit at the bottom to be worn over a Hip Dysplasia harness or brace, providing an easier and gentler way to graduate from swaddling.The Swaddle UP can be used from birth and has proven to help your baby sleep better and for longer. The snug fabric provides the cosy, swaddled feeling that babies love, while the "wings" design maintains baby`s natural and preferred "arms up" sleeping position. Babies can suck their hands through the fabric of the Swaddle UP, allowing them to self-soothe and they can’t scratch their face. The double zip makes it quick simple for you to change your child's nappy, eliminating the need to remove your little one from their swaddle.