About This Safety Certifications: The crib mattress meets the16-CFR-1633,16-CFR-1632 and 16 CFR 1241 Federal Flammability tests Firm Support: The crib mattress is made of high density foam. It provides good support and stability when the baby rolls over, avoiding the risk of personal injury and suffocation Good Sleep: The surface of the toddler mattress is made of premium brushed fabric, is soft breathable and non-toxic material, so the toddler bed mattress doesn't make much noise at all and can improve the quality of sleep Dual-Sided: Our toddler bed mattress size is 52"L x 27.6"W x 5"Th. It’s designed to be used on both sides and it is recommended that the mattress is flipped or rotated every 2-3 months to maximise performance Customer Support: We stand by our commitment to quality and provide each customer with exclusive service to solve problems Overview Brand : Letmxiu Size : 52" x 27.6" x 5" Product Dimensions : 52"L x 27.6"W x 5"Th Item Firmness Description : Firm Top Style : Tight Top Cover Material : Polyester Number of Layers : 1 Fill Material : High Density Foam Special Feature : High Density Foam-Firm, No Noise, Sleep Safe. Comfort Fabric-Soft, Cute Prints, Sturdiness. Color : White