Cotton Imported IDEAL TEMP FABRIC: HALO SleepSack Swaddle Ideal Temp 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. SIZING RECOMMENDATIONS: Swaddle must be appropriately sized, snug, positioned around baby’s torso and securely fastened. Ideal Temp fabric is designed to be cozy with some stretch for comfort. Because of this, it can run slightly bigger than our other swaddles. Make sure to choose the correct size for your baby’s height and weight. We recommend sizing down if your baby is in between sizes. View the size chart to select the proper size for your child. COZY 3-IN-1 SWADDLE DESIGN: This newborn sleep sack features HALO’s signature 3-way swaddle design. It adjusts to fit baby’s sleep style: arms in, hands-to-face, one or both arms out. Our signature “Back is Best” embroidery is a gentle reminder to place baby in the recommended sleep position. BABY FRIENDLY DESIGN: This innovative sleeping swaddle sack is designed with an inverted zipper for easy diaper changes and scratch-free zipper covers. The roomy sack is recognized by the International Hip Dysplasia Institute as promoting healthy hip development. MACHINE WASHABLE: Turn inside out and close zipper before laundering. Machine wash cold with like colors on gentle cycle. Close zipper and fastener strips before washing. Tumble dry low. Do not bleach, iron or dry clean. Halo Sleepsack Swaddle Ideal Temp