When you place your baby to sleep on their back, their natural position is for their arms to go up. The Love to Dream Swaddle UP Original features a patented design that allows you to swaddle your baby with their arms up in this more natural position. The medical reason behind baby's desire to have access to their hands is that when they wake up at night, they want to self-soothe, which is simply stroking their cheeks or sucking on their hands. If they are swaddled with their arms restricted, they cannot do this, which causes them to wake, get frustrated, and try to get out of traditional swaddles. Features: -1 TOG -The Swaddle UP is a stretchy blend of Cotton and Elastane designed to be snug and cozy around their torso, contain baby's arms, and thereby calm the startle reflex, encouraging a long, restful night's sleep for Mom and baby -The Swaddle UP is safer than swaddling your baby with traditional blankets -With the Swaddle UP, there are no difficult wrapping techniques required and no risk of dangerous loose blankets in your baby's crib -The Swaddle UP's dual zippered design allows you to do diaper changes while keeping baby swaddled and has no pesky snaps, noisy Velcro, or tricky wrapping, ensuring that your baby stays comfortably swaddled all night -In addition, the Swaddle UP has plenty of room for baby to move their legs and hips, and recently received recognition from the International Hip Dysplasia Institute (IHDI) as being a 'Hip Healthy' product.