Summer Lite Love to Dream Swaddle Up Sleepy Sack is 30% lighter, making it one of the lightest weight swaddles available & perfect for extra hot days & nights. Unique design allows baby's arms to swaddle up in a natural sleep position. Hands Up is a self-soothing position that helps baby fall asleep faster & sleep longer. Hips splay in a healthy position without displacement. 2-way zipper for easy diaper changes and a slot for stroller strap. No wrapping required. 2 colors & 2 Sizes make this a great gift choice.