? Size Suggestion: Size S length 70cm fit for baby 6-18 months(suggest height 70-85cm), Size M length 80cm fit for baby of 12-24months(suggest height 80-95cm), Size L length 90cm fit for baby of 2-4 years (suggest height 90-105cm), Size XL length 100cm fit for baby of 5-6 years (suggest height 100-115cm),Size XXL length 110cm fit for baby of 6-8 years(suggest height 110-125cm). Please choose the appropriate size according to the specific height and weight of your baby. ? 8cm Hem Widen: Hem widen of the toddler sleeping bag with feet makes sure your lovely baby enjoy the freedom to crawl run and jump without any restraint.Full ensure baby's easy play and happy activity time. ? Bottom Full Opening Design: The baby sleep bag with legs bottom full opening design is better nappy changing for little baby,convenient for toddlers to go to the bathroom. Two way zipper plus bottom full opening design make put on and take off in a second come true.Plz note: Size S/M has an open crotch and closed legs design,Size L/XL/XXL bottom full open design. Babies can keep warm in winter with our thick sleep bag they can means keep colds and fevers away!. ? Removable Sleeves : The removable sleeves is designed for dealing with temperature differences. The sleeves can protect babies from catching cold in a frigid climate.Also convenient to remove by zipper to avoid overheat. This sleeping bag with legs is ideal for temperature from 0? - 10?. ? 100% cotton with Oeko-Tex Certificate : The 3.5 tog baby sleeping bag with feet made of 100% island cotton. Oeko-Tex Certificate Standard 100 insure the material is super reliable and safety.No pilling,no fade,no deformation,no fluorescent! The Baby sleeping bag sure will create a comfortable and safe sleeping environment in winter. Machine Washable.