cotton+polyester Imported ✔️ WARM & SOFT & COMFY – Roksuma Baby sleep sack 6-12 months is made of 100% cotton fabric and fluffy polyester filling, which is super soft, breathable and cozy. With a TOG rating of 2.5, the toddler sleep sack is perfect for room temperatures around 61℉-68℉, please worn over long sleeve pajamas for cold winter nights. ✔️ ERGONOMIC DESIGN – Our toddler sleeping sack features a 2-way zipper that makes it easy to put on and take off, and allows for quick midnight diaper changes without waking up baby. The top zipper flap protect any scratches or discomfort from baby's delicate skins, the sleeveless design helps regulate baby's temperature. ✔️ SAFE AND COZY SLEEP – The infant sleep sack replace loose baby blanket to eliminate the risk of suffocation and there is no worry about baby kicking off the cover at night. This 2.5 tog sleep sack provides a secure, warm and comfortable sleeping environment for your beloved one, baby will sleep through the night soundly. ✔️ OPTIMAL FOR EVERY BABY – The winter sleep sack has plenty of leg room, which is great for promoting healthy hip development, baby can also grow into it. Designed with gender neutral color and cute cartoon pattern, the baby sleeping sack is suitable for both boys and girls, the best practical baby essentials. ✔️ ACCOMPANY BABY'S GROWTH – Baby sleep bag is essential baby item for daily use, both baby and parents can enjoy better sleep. Roksuma baby wearable blanket comes in four sizes to fit your growing baby: baby sleep sack 0-6 months, sleep sack 6-12 months, toddler sleep sack 12-18 months, sleep sack 18-24 months. winter sleep sack 6-12 months 2.5 tog sleep sack 6-12 months toddler sleep sack 12-18 months warm sleep sack quilted sleep sack 6-12 months Wearable Blanket baby sleeping sack 0-3 months baby boy sleep sack 18-24 months toddler sleeping sack