Keep Cosy In This Stylish Super Soft Fleece Monkey Onesie. 100% Super Soft Luxurious Fleece Polyester. Size 8 10 12 14 16 18. Soft Feel To It, Both Inside And Out. Size S fits UK 8/10, M fits 10/12, L fits 12/14, XL fits 14/16, XXL fits 16/18.