Dream On Me, 5-inch Inner Spring Play Yard Mattress is of supreme comfort and quality for play yards measuring 25.5 x 37.5. This play yard mattress features interwoven steel coils that are wrapped in a hypo-allergenic, polyurethane foam and protected with a waterproof cover with Lock Stitch venting. The waterproof, hypo-allergenic, antibacterial, cover aids in the prevention of mold, mildew and odor and easily wipes clean with warm water and a mild soap. This mattress is proudly constructed of quality materials and workmanship in the USA. Lead and phthalate free, this mattress passes the Federal Standard Flammability Standard 16 CFR 1633.