Premium Cotton Material: Our baby wearable blankets are made of 100% natural cotton material that is very soft and gentle on babies' delicate skin. The tog 0.5 makes them the perfect choice to keep your little one cool and comfortable during hot summer 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. In addition to these, 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 Pattern Design: The exquisite pattern designs of our baby wearable blankets are truly adorable and eye-catching. The four different patterns: dinosaur, rainbow, elephant, and star, provide a variety of options for parents to choose from. Our commitment to professional design ensures that every detail is carefully considered, resulting in products that are loved by both babies and parents alike. | Machine Washable and Very Durable: this sleep sack is designed to meet the demands of your baby's daily life. It can be washed in washing machine at a slow speed with low-temperature drying or flat drying. Please avoid using bleach. Made with 100% premium baby fabric, 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).