Dream On Me, Star-Burst 3 in. Spring Coil Portable And Mini Crib Mattress is designed to provide supreme comfort and support as a full size crib mattress. This portable/mini crib mattress features interwoven steel coils that are wrapped in hypo-allergenic, polyurethane fiber and protected with a waterproof cover with Lock Stitch cover. 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 tested this mattress passes the Federal Standard Flammability Standard 16- CFR 16-33. Designed to fit a standard 24 in. x 38 in. Portable/mini Crib. As parents are looking for more space saving furniture mini and portable cribs are ideal for apartment/ smaller home and Dream On Me sunshine mattress fits most mini and portable cribs (not designed for standard cribs or pack 'n plays). Material: Fabric.