Don’t overspend on elaborate crib mattresses full of unnecessary materials - instead, choose an affordable baby mattress. Our Sleepy Bear Mattress-in-a-Box is an easy piece at an easy price, with no compromises to safety, support, or a quality night’s sleep. The fine-tuned comfort of 100% Polyurethane 30D support foam and water-resistant, air-knit fabric cover allows your little one to feel comfortable, safe, and supported.