The Amazing Baby Swaddle Sack is designed for babies who prefer arms up. The Swaddle Sack is an innovative design featuring uniquely modified convertible sleeves with foldover mitten cuffs to allow baby to have full access to hands to self-soothe and swaddle snugness to help reduce the startle reflex that can wake a sleeping baby. The Swaddle Sack design provides the support of a swaddle with the benefits of ease of use for the caregiver, and provides an important innovation that allows caregiver two options for providing baby access to his or her hands: (1) allows baby to have access to their hands via the foldover mitten cuff in the open option, and (2) allows the hand opening to be closed should the caregiver prefer to reduce the risk of baby scratching their face. The hip healthy design allows baby’s knees and hips to flex. Many parents like the Swaddle Sack with sleeves because the design helps keep baby comfortably warm on cooler nights instead using a sleeveless wearable blanket. The Swaddle Sack is made from premium, stretchy cotton knit and features a 2-way zipper for ease of use. Beneficial to babies; including babies who do not like to be swaddled with arms restrained, babies who prefer sleeping with arms up, and older babies ready to transition out of a traditional swaddle. Swaddle Sack is a registered trademark of SwaddleDesigns. Patent pending design. Machine washable. Designed and manufactured by SwaddleDesigns exclusively for Amazon.