The versatile 2 in 1 organic cotton combo mattress will grow with your child for many years. It is waterproof, firm and eliminates potentially harmful chemicals from your child’s crib. The waterproof side is perfect for infants and bed wetters, while the quilted side provides a more appropriate surface for older children. The Naturepedic mattress features a luxurious organic cotton fabric with an easy-to-clean 100% polyethylene clear food grade waterproof coating. The optional Organic Cotton Wat erproof Mattress Pad and Non Waterproof Organic Cotton Flannel Mattress Pad are soft and breathable mattress pads that provide a non-sweaty and comfortable barrier. These pads in combination with the Combo 2 in 1 Organic Cotton Mattress will help bri ng sweet dreams to your child. Features: -Waterproof organic cotton fabric with an easy-to-clean 100% polyethylene coating top -Quilted organic cotton bottom -No wool or latex -Heavy-duty orthopedic innerspring -Exclusive FlameBreaker fire protection -Meets and exceeds all federal and state flammability standards -iParenting media award winner -Made in the U.S.A Specifications: -Crib mattress dimensions: 252 Coils: 6" H x 27.75" W x 52" D - Crib mattress also fits toddler bed -Flat changing tabl e waterproof pad dimensions - 15" W x 30" D -Crib waterproof pad dimensions: 28" W x 52" D with corner straps -Twin waterproof pad dimensions: 38" W x 75" D with corner straps -Full waterproof pad dimensions: 53" W x 75" D with corner straps -Queen w aterproof pad dimensions: 60" W x 80" D with corner straps -Flat changing table flannel pad dimensions: 18" W x 28" D -Crib flannel pad dimensions: 28" W x 52" D with corner straps -Twin flannel pad dimensions: 38" W x 76" D with corner straps -Full flannel pad dimensions: 50" W x 76" D with corner strap