About This Organic Construction: 100% GOTS certified organic crib mattress meets flammability standards without flame retardants; UL/GREENGUARD Gold certified for low emissions; breathable for healthier sleep. Dual-Sided Design: 2-stage support system offers a firmer side specifically engineered for infants and a medium-firm side for toddlers; this dual-sided crib mattress grows with your child from newborn to toddler years for extended use Enhanced Breathability: Breathable mattress cover features a 3-dimensional structure allowing air to flow through the fabric and under Baby; improved airflow reduces suffocation risks; best crib mattress for temperature regulation Naturally Waterproof: Organic cotton fabric includes patented waterproof coating derived from sugarcane; surface cleans easily with soap and water; no plastic covers needed; maintains breathability while protecting the breathable baby mattress LIGHTWEIGHT: Our patented wavesupport core is strong yet incredibly lightweight when comparing to traditional coil mattresses; weighs 14 lbs Overview Brand : Naturepedic Size : 1 Count (Pack of 1) Product Dimensions : 52"L x 27.25"W x 6"Th Item Weight : 17.4 Pounds Item Firmness Description : Extra Firm Top Style : Tight Top Cover Material : Cotton Number of Layers : 4 Fill Material : Cotton Special Feature : Organic + Non-toxic