Sleep tight 120 x 200 duvet cover set - peonysleep tight is a patented product designed to help children sleep without uncovering during the night. it also helps prevent children from falling out of bed on beds without a railing. it is easy to use thanks to the double-sided zipper sewn into the flexible fabrics on the sides of the duvet cover. it is 100% cotton fabric. set includes: 1 duvet cover 1 fitted sheet 1 35 x 55 pillowcase 1 50 x 70 pillowcase it is recommended to be used with a 120 x 180 duvet. washing at 30 degrees is appropriate. drying is not recommended. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.