Deluxe fabric + Wavesupportâ„¢ Plus. Wipe clean waterproof surface: Easy-to-clean 100% polyethylene waterproof surface so pure it meets food contact standards. Provides the ultimate non-toxic and stain resistant waterproof surface. Organic cotton fabric & filling: Organic Cotton is an ideal material that is both natural and renewable. Organic Cotton is unbleached undyed and grown without synthetic pesticides herbicides or chemical fertilizers. Firm comfortable support: Wavesupportâ„¢ made from pure food-grade polyethylene provides excellent support and durability that rivals innersprings and premium foams. The wave structure achieves incredible strength with very little material offering an ultra lightweight design that is both firm and comfortable. Wavesupportâ„¢ Plus features 33% more waves for added strength and reinforcement. NO polyurethane! Hypoallergenic design: Dust Mite/Bed Bug Barrier - No need for an additional dust mite encasing. No Wool or Latex - No need to worry about these high allergy materials. Non-toxic fire protection: 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 harmful chemicals. Seamless design: Heat sealed waterproof seems provide a more contemporary look and also prevent moisture penetration for a more hygienic design. Wipes clean to the edge! Safe expert design. Also fits toddler beds. Square corners for a snug fit. Made in the U.S.A.