WITH FEET DESIGN – Our cute sleeping bag use the feet design to let your baby move freely.The application scene is richer, not only to keep warm when the baby sleeps, but also to play happily indoors. 3 ZIPPER – This baby sleeping bag with humanized 3 zipper design, convenient for mom to change diapers,No need to take off baby’s sleeping bag can change diapers, more simple and convenient. BREATHABLE&REMOVABLE- Choose high-quality cotton, four layers of fabric, delicate and soft, good breathability.The detachable sleeves are designed to be used in both summer and winter. LARGER SPACE – The average child kicks the quilt more than 200 times per night.This widen the shoulders and hem baby sleeping bag to make sure your baby is free to roll over and care for your baby’s free growth and development. SIZE TIPS – Baby sleeping bag size corresponds to kids height: Small(0-1T):Below 33.5in/2.8ft—-Medium(1-3T):31.5-39.4in/2.6-3.3ft—- Large(3-5T):37.4-47.2in/3.1-3.9ft. The size of the product description has been converted from Asian size to American size. The size label of the received product is Asian size.If you have any doubts, please contact customer service for suggestions.