Swaddle UP has the distinction of being a zip-up swaddle that lets baby sleep with their arms up. This natural position gives them access to their hands for self-soothing (babies often settle themselves by stroking their cheeks or putting their hands in their mouths), while the fabric “wings” protect baby's face from fingernail scratches. Swaddling helps your baby feel held and secure, and calms the natural startle reflex, especially in the first four months. This helps your baby stay asleep longer. Using a swaddle of any kind instead of covering baby with a loose blanket is also safer, avoiding extra fabric in the crib or bassinet that can cover your baby's face or impede breathing. For those who just can't seem to get the folds of a blanket swaddle just right, “instant” swaddles like this one can be a great option. The zipper is quick, easy and quiet (many other swaddles use Velcro), and it will stay on all night. It's a two-way zipper, too—you can get to baby's legs without undoing the top, which makes diaper changes easier. Made with 95% organic cotton and 5% elastane, the swaddle fits snugly, so no extra wrapping is needed. But unlike a traditional swaddle, the Swaddle UP is roomier around the hips, leaving space for baby's legs to move freely and promoting long-term hip health.