Consider Naturepedic an excellent mid-price option for an eco-friendly and non-toxic crib mattress. Naturepedic’s Classic and Lightweight Classic cost under $330 and include a built-in waterproof cover, unlike most other crib mattresses, where you’d have to buy separate covers or puddle pads. Sleep Lily’s innerspring mattress costs $360 but doesn't have a waterproof cover. Even the highest priced Naturepedic mattress (the two-stage 252 coil Breathable Ultra) costs under $550. In contrast, an OMI OrganiPedic crib mattress with innersprings costs nearly $700. Lullaby Earth (owned by Naturepedic) offers a less expensive version of the Naturepedic lightweight mattress for $179-$279 made with recycled polyester fiber fill (instead of organic cotton) and a waterproof polyethylene cover. It also has some decent eco-certifications, though I'd still favor the Naturepedic Lightweight because of the organic cotton content and the company's longstanding commitment to quality and service.