There are several factors including quality and safety to keep in mind when purchasing a crib mattress for your baby. Therapedic crib mattresses are made by hand, using only the finest materials. The result is a baby crib mattress with superior support, comfort and quality that promises a safe night’s sleep for your baby every night. The Therapedic Sweet Baby Firm and Extra Firm Crib mattresses extra-firm surfaces are made from premium polyurethane foam, guaranteeing a secure and restful sleep. These Therapedic crib mattresses also feature a hypo-allergenic, quilted, waterproof white vinyl cover whose surface resists moisture and stains.