【Perfect fit】 PERFECT FIT - Our 38 x 26 Pack N Play Mattresses Topper is designed to fit most Pack N Play Playards. 【Dual-Season Baby Mattress】: 3D honeycomb foam (98% better airflow) with summer-cool 98% breathable mesh & winter-warm 35% Tencel, 【Machine Washable】The pack n play mattresses pad cover is made from 35% Tencel and 65% Polyester fabric, ensuring it is machine washable for easy maintenance. It boasts a low hypoallergenic quality, 【Waterproof Tencel cover】Bassinet mattress cover is made of high quality TPU waterproof membrane that Effectively preventing liquid Spills & Nighttime Accidents Please confirm the bed size before placing an order If for any reason you are not satisfied with our product, please contact us directly. breathable bassinet mattress