Durable, Waterproof Vinyl Cover Made in US FITS MINI AND PORTABLE CRIBS: This baby mattress fits most mini cribs and portable cribs; mattress measures 38"L x 24"W x 4"H (NOT designed for standard cribs or Pack 'n Plays) | Measure your crib first to ensure a perfect fit IDEAL SUPPORT FOR BABY: This baby mattress features a fiber core made from recycled materials for firm comfort and support | Non-toxic construction WATERPROOF DESIGN IS EASY TO CLEAN: Features a durable, waterproof vinyl cover that wipes clean SAFETY CERTIFICATIONS: GREENGUARD Gold certified: recognizes products with low chemical emissions, contributing to healthier environments | Meets or exceeds flammability, lead, phthalate and CPSIA testing and does not contain toxic fire retardants MADE IN USA: This baby mattress is proudly made in Wisconsin | 10-year warranty