HALO® SleepSack® swaddle Tech Fabric with IntelliThread™ Technology helps to regulate your baby's temperature. This innovative material absorbs, stores, and releases heat to help ensure baby is perfectly safe and comfortable. The IntelliThread™ fibers are embedded within the cozy fabric and won't wash out or fade. Also includes HALO®'s signature 3-way swaddle design that adjusts to fit baby's sleep style: arms in, hands-to-face, or one or both arms out. Signature "Back is Best" embroidery is a gentle reminder to place baby in the recommended sleep position. Features an inverted zipper for easy diaper changes and scratch-free zipper covers. Roomy sack design is recognized by the International Hip Dysplasia Institute as promoting healthy hip development. Available in 3 colors, each with contrasting neon trim. For use over regular sleepwear.