Product Description SwaddleDesigns zzZipMe Sack is perfect when baby is ready to graduate from swaddling. The zzZipMe Sack is a wearable blanket featuring a clever 2-way zipper which zips down from the top, making it easy to place baby into sack, and also zips up from the bottom, keeping baby snugly warm during diaper changes. So easy! This zzZipMe Sack has a TOG rating of 2.2 which is the recommended TOG rating for temperatures of 18-21 degrees C (the temperature range many medical experts recommend for sleep environments). 100% microfiber, plush and fuzzy inside and out with soft satin trimmed edges. Machine washable and made in the USA. Box Contains One zzZipMe Sack