Material: Flannel Include: Jumpsuit (without slipper, if you need slipper, find the link in our store) Feature: Soft/ Warm/ Loose Adult Size: S: 144-153cm (Height) /4'8-5'0 Inch M: 154-163cm (Height) /5'0-5'3 Inch L: 164-173cm (Height) /5'3-5'7 Inch XL: 174-183cm (Height) /5'7-6'0 Inch PS: Please choose the size depend on your Height, the Onesie is Loose, Overweight friend choose plus one size; It is normal that there is few thread in the Onesie.