The Sopora Delux is a modern luxury crib mattress with a practical edge. Offering all the features of the Sopora Ultimate, the Delux only differs on the toddler sleep side. The Delux is a 6 deep, all foam mattress with dual sleep surfaces. Made with CertiPURUS certified foam. The Delux is engineered to withstand wear and provide an even ergonomic support for the full span of your babys crib mattress use. As your child develops the density required of their sleep surface can change. For infants, use the ultra-firm, high-density foam side. Harvest Foam was developed by industry leaders, to deliver cleaner foam. All Harvest products utilize a blend of natural oil based and conventional polyols. Natural polyol is made from natural plant based renewable oils. This blend enables Harvest foam to perform as well as conventional foam without sacrificing comfort and helping the environment at the same time. As your child grows flip the mattress to the Supple Soft high-density foam toddler side. Supple Soft provides a layer of foam, which is plush in feel and luxurious. The enhanced airflow of this foam creates better air circulation at the surface of the mattress. Supple Soft foam has a high level of resilience (bounce back) and high level of durability. The Delux offers Baby Safe side seams, which are welded with ultra-sonic sound waves to keep wetness out, allowing the inside of the mattress to stay clean. Baby Safe seams are dropped to the sides of the mattress creating a seamless waterproof edge with no decorative cording or holes on the surface. This eliminates entry points for allergens, bed bugs, and fluid leakage. The Delux offers square corners and edges to fit tightly into the crib, with no rounded corners or surface designs that can trap dirt or dust mites. The rectangular shape of the mattress, the same shape as the crib, holds sheets tight to keep baby safe. The Deluxs medical grade, baby soft, stretch-knit mattress cover is compliant with all current safety standards. Its lightweight and pliable nature enables the babys body to conform to the surface while allowing the inner construction to provide comfort and ergonomic support for which it was designed. The cover is vinyl, PVC, lead and phthalates free. Ultra-Fresh treated for antimicrobial protection. The smooth soft cover maintains a consistent temperature under baby. It cleans easily with a damp sponge and wont retain unpleasant odors or stains.