Safe Comes First ! - According to ASTM F2933-21, play yard mattresses are still limited to a maximum of 1.5 inches.With a 1.5 inch thickness, Lilian&Gema complies with the US standard and encourages proper body alignment for ideal spine development. More importantly, compared to thicker mattresses, 1.5 inch can effectively reduce the risk of suffocation | High Density 25D Foam - Our mattress pad is crafted from CertiPUR-US certified premium foam. Meet the safety standards of federal and free of any harmful chemicals. Highly resilient, breathable and high density foam can make a perfect balance of comfort and support to protect baby's spine | Universal Size - Measuring 38x26x1.5 inches, Lilian&Gema pack and play mattress is compatible with most brands of pack and plays, mini cribs, and non-full-size cribs. IMPORTANT: ALWAYS MEASURE PLAYARD BEFORE BUYING. Our pack and play pad is specifically designed for 38"x26" playard ONLY | Removable & Washable Cover - The outer layer is an ultra-soft Jacquard cover and backed with waterproof TPU, making it ideal for baby's sensitive skin. The waterproof function completely prevents liquid from seeping into the foam, keeping foam always clean and dry | Baby Travel Essential - Carry bag included. With its tri-fold design, our pack n play mattress can be effortlessly folded up, making it convenient to carry on wherever you go. Whether you're traveling or visiting friends, our baby can have a comfortable place to rest and play