Lullaby Earth crib mattresses were designed by parents, grandparents, and engineers dedicated to creating the safest baby crib mattress possible. It's the result of years of research, with safety and affordability as our top priorities. Lullaby Earth packs in all the key safety features you want in a crib mattress while making cleanup and bedding changes convenient and simple for parents. The mattresses feature patented waterproofing and a patented WaveSupport core. They are easy to wipe clean, and the seamless edge design prevents build-up and keeps the inside of your baby's mattress clean and dry. The firm, flat surface and reinforced edge support provide a comfortable and safer sleep environment for your baby or toddler. Your crib mattress will last through toddlerhood and beyond! Healthy Design with NO Flame Retardants We're on a mission to provide the safest crib mattress, in terms of physical safety and chemical safety. This includes removing all flame retardant chemicals as well as other questionable chemicals. Lullaby Earth mattresses are made from food-grade polyethylene and 100% PETE, materials used throughout the food packaging industry due to their recyclability. Using these food-safe materials means that our crib mattresses are made without common potential allergens or chemicals. Lightweight Wave Support Our patented WaveSupport core means bedding changes are easy, since Lullaby Earth crib mattresses weigh only seven pounds. Designed with square corners for a snug and secure fit to help keep your baby's arms and legs safe inside the crib. Fits standard size cribs (approximately 27 1/4" x 51 5/8" x 6"). Strong Structural Support When it comes to providing proper support for your baby, Lullaby Earth crib mattresses won't let you down. Our patented WaveSupport design conforms to pediatrician firmness recommendations so your baby has the firm, flat surface needed for safer sleep. Firm Edges Many crib mattresses have soft or flimsy edges. Lullaby Earth mattresses have reinforced edges, which help to keep your baby's arms and legs from getting caught between the mattress and the crib. They also stand up to bouncy toddlers who stand or jump at the edge of their bed. Snug Fit It's important that the crib mattress fits properly in your baby's crib without any gaps. Lullaby Earth crib mattresses are designed to fit snugly in standard size cribs. Use the two-finger test for safety: gaps between the mattress and crib should be no wider than your first two fingers. Hygienic Lullaby Earth mattresses have a practical, easy-to-clean design, so your baby's crib stays clean and hygienic. Wipe clean with mild detergent. Lullaby Earth's mission is to create the safest and healthiest crib mattresses on the planet at prices everyone can afford.