Soft and Cozy?The fleece baby sleep sack made from a super-soft polyester micro-fleece fabric, very soft, cozy and breathable. Our 1.5 TOG fleece sleepsack suitable for temperature 64-72?, as an ideal option for autumn, early winter and spring; Its plush and fluffy texture in inside and out keeps your baby cozy while effectively wicking away moisture. | Safer Environment: Our micro fleece baby Wearable Blanket are CPSC-certified for your baby's safety and comfort. Arm and neck openings sized for a safe fit, prevent the baby from slipping into the fleece sleeping sack. Sleeveless design regulates your baby's temperature and reduces the risk of over-heating.Generous space is beneficial for healthy development of baby's hips and kicking freely. | High Quality Zipper with 2-Way: It's double zipper allows unzip from the bottom for easy diaper change. The microfleece baby sleep sack with External wash tag design, zipper protector on the top and the back of zipper, protect your baby's jaw and skin from being scratched and provide a peaceful and restful sleep for the little one. | 2-Pack and Suitable Size: The fleece baby wearable blanket comes with 2 pack, convenient for the baby to change at any time. There are 4 sizes available sleeping sacks for your choices; S for 0-6 Months. M for 6-12 Months. L for 12-18 Months. XL for 18-24 Months. Please refer to our size chart carefully before you order our sleep sacks. | Easy Care and Durable: Yoofoss microfleece baby sleepsack are machine washable, could be tumble dry at low temperatures(<30ï 86©. This sleep sack can withstand repeated washings without fading, and its advanced technology ensures a shrinkage rate of less than 3%.Warm tip: Just the right comfort for moderate seasons or climates; can be layered with warmer sleepwear for cooler temperatures.