Rayon Cotton Imported 【Perfect for Sensitive Skin】Thin baby sleep sack section suitable for spring, summer and autumn ，No risk of overheating in babies- Made of 100% Rayon Cotton. Super soft, cozy. machine washable. Perfect for babies with sensitive skin. 【2-Way Zipper】Our wearable baby blanket has a convenient 2-way zipper that allows for easy diaper changes in the middle of the night. To ensure your baby's safety and comfort, we have designed the blanket with an interior zipper guard and top zipper cover that protect their delicate skin. 【Spacious enough】Perfect fit for arm and neck opening sizes， The carefully designed leg space allows the baby to move freely，But can't be kicked off，So the baby stays warm all night long. Sleeping bags are helpful in promoting healthy hip development. 【Security Temperature】Our wearable blanket has been certified by Labs as TOG 0.3, ensuring that it offers the perfect amount of warmth for your child without the risk of overheating. It helps maintain a stable body temperature. 【baby essentials】Baby sleep sacks can help your baby get a longer, more restful night's sleep. They come in 5 sizes, XS for 0-3 Months, S for 0-6 Months, M for 6-12 Months, L for 12-18 Months, and XL for 18-24 Months. Each Blanket is backed with 60-Day Money-Back Guarantee. You are welcomed to have a try. We specialize in creating top-notch baby bedding products, having spent many years sourcing materials and designing for previous generations. Our focus is on producing products that are safe and gentle for delicate skin, ensuring a comfortable and secure sleep for your little one in their nursery.