Baby Deedee Sleep Nest Sleeping Sack, Warm Baby Sleeping Bag fits Newborns and Infants,Medium (6-18 Amazon Product Link: http://amazon.com/dp/B005LLWKUG/?tag=loan68-20 Shell 100% Cotton, Filling 100% Polyester Imported SAFE AND COZY SLEEP: breathable fabric & comforting cocoon shape mean a restful night’s sleep for all UNIQUE FEATURE: exclusive shoulder straps make placing a sleeping or standing baby in the sleep nest a cinch, high-quality reverse zipper. Filling is 100 percent polyester.2-layers of supersoft cotton HIGH QUALITY: 100% cotton exterior, soft quilted interior.They are intended to be worn over regular sleepwear WINTER WEIGHT: quilted duvet material, extra layer of warmth, TOG 2.5, Recommended room temp 64-74 DegreeF Machine wash cold inside out with like colors. Don't bleach, tumble dry low, don't dry clean Top reviews from the United States Feels just like a comforter for your baby My son sleeps so well in this sleep sack! It is true to size as well. I got this when my son was about 8 months but he is very long so I ordered a size up!