Not suitable or intended to be worn as sleepwear. Our own Wunsy Cat Onesies are in a good generous fit with good quality fabric. You won't be disappointed. Super Soft Fleece. Well made with plenty of room. Buy up a size if your child is taller than normal, or if you like a lot of growing room. 100% Polyester. Machine Wash and Tumble Dry. Fastening: Zip. Comes with a velcro attached Puss tail. Uk standards means the tail can't be permanently attached in case it catches on something. It is attached with Velcro. Zips from top or bottom, zips at both ends. A gorgeous, soft and bespoke Cat Onesie Wunsy Super Soft Childrens Fleece Cat Kitty Onesie Kids Playsuit with Tail & Hood in Grey Size: 10-11 Years