The Naturepedic Dual Firmness Organic Crib Mattress features square corners, seamless edges and dual firmness! Waterproof edges and heat sealed waterproof seams prevent moisture penetration for a more hygienic design. No seepage of fluids or entry points for dust mites. Features square corners for a safer and more snug fit in your crib or toddler bed. Promote a Healthy Environment for Your Baby or Child Baby and Children’s mattresses typically use materials such as vinyl/PVC and polyurethane foam which release questionable chemicals over time. These materials and chemicals have been eliminated in the No-Compromise Organic Baby Crib Mattress. NEW Dual Firmness Option Features a slightly firmer infant side and a slightly softer toddler side that will grow with your child for many years. Waterproof Surface – Food Grade Polyethylene Easy-to-clean 100% Polyethylene food grade waterproof surface. An excellent alternative to the vinyl/PVC found in nearly all crib mattresses. Polyethylene is an environmentally friendly plastic used throughout the food packaging industry for its purity and non-toxic properties. Provides the ultimate non-toxic waterproof and stain resistant mattress cover. Organic Cotton Filling Mother nature provides the best materials for a healthy and comfortable sleep. A crib mattress made with organic cotton promotes a healthy and more chemical-free sleeping environment. Cotton is an ideal filling material that is both natural and renewable. Organic Cotton is unbleached, undyed, and grown without synthetic pesticides, herbicides, or chemical fertilizers. Firm Support Heavy-duty orthopedic innerspring and firm flat surface provide ideal support in accordance with pediatrician and Consumer Product Safety Commission (CPSC) firmness recommendations. In addition, heavy-duty border rods add strong side and edge support for all models. Designed for a snug fit. Hypoallergenic Dust Mite Barrier Cover – No need for an additional dust mite barrier encasing. No Wool or Latex – No need to worry about these potentially high allergy materials Fire Protection Cotton does not burst into flames or release deadly fumes when ignited (as compared with polyurethane foam). Exclusive fire protection system features a non-toxic and naturally derived fire barrier system that is safe and effective. It meets and exceeds all Federal and State flammability standards without the use of potentially harmful chemicals. Heirloom Quality Construction Premium components & exquisite finish Standard crib size (27.75 x 52 x 6) 150 Coils Also fits toddler bed Gift Wrap not available.