Premium Micro-Fleece: Our baby wearable blankets are made of 100% polyester micro-fleece that is very soft and gentle on babies' delicate skin. The tog 1.5 makes them the perfect choice to keep your little one warm and comfortable during cold winter nights. Our baby sleep sacks are breathable and moisture-wicking, so your baby can enjoy a full night of restful, uninterrupted sleep. | Generous Bottom Space and 2-way Zipper: Our sleeping bags have generous bottom space that allows your baby to kick and move their legs freely. The 2-way zipper makes it easy for you to change your baby's diaper. Our sleep sacks come with protective layers that prevent the zipper from accidentally scratching your baby. The sleeveless design allows free movement of your baby's arms, making it easier for them to roll over and sleep comfortably. | Exquisite and diverse pattern design: Our baby wearable blankets are designed in both print and solid colors, providing a variety of options for parents to choose from. Cute print elements include Woodland Animal、Dinosaur、Floral 、Rainbow, etc. Solid colors like Grey, Blue, Sage Green and Snow White are all baby favorite colors. Our commitment to professional design ensures that every detail is carefully considered. | Machine Washable and Very Durable: Our sleep sack is designed to meet the demands of your baby's daily use. It can be washed in washing machine at a slow speed with low-temperature drying or flat drying. Please avoid using bleach. You do not have to worry about pilling, wrinkling, shrinking, or stretching after washing. It gets even softer with each wash and maintains its colorfastness even after multiple washes. | Multiple sizes: There are four sizes available for sleep sacks: small, medium, large, and X-large. Each size is suitable for a specific age range and weight of the baby, as well as their height measurements. Small is for babies 0-6 months (10-18 lbs, 23-28 in), medium is for babies 6-12 months (15-24 lbs, 26-31 in), large is for babies 12-18 months (22-28 lbs, 30-34 in), and X-large is for babies 18-24 months (26-36 lbs, 35-38 in).