【Suitable for】This bassinet mattress compatible with ANGELBLISS, AMKE, Bellababy, Yamesmile, Besrey, Milliard, Miclassic and Evolur Stellar Baby Bassinet. The bassinet mattress measures 35" x 20" x 2''. Please measure your bassinet mattress before you buy. 【Dual Sided Firmness】Baby bassinet mattress has dual-sided firmness to provide support and comfort for babies at different stages of growth. The softer side features cooling gel memory foam; the firmer side features high-density support foam. 【Removable and Washable Cover】The bassinet mattress cover is made of 35% Tencel and 65% Polyester fabric. It has a zipper so you can easily remove the cover for machine washing to keep your mattress clean and fresh. 【Waterproof】The inner surface of the bassinet mattress cover is covered with a high quality TPU waterproof membrane. that repels all other liquids, including fluids, perspiration, bed wetting, and stains. The waterproof feature protects the mattress and keeps it looking brand new. 【Expand and Washing Instruction】Please wait 24-36 hours for the foam to expand after opening. Gently unzip the cover and machine wash on a low, delicate cycle, then air dry. NeoBorn Bassinet Mattress Topper Retangle 35 x 20 x 2 inch