Infant side: features a resonated polyester fib fill batting tempered steel spring and 6-gauge border wire to provide your little baby with the firm but comfortable support that he or she needs.

Toddler Side : just flip the Lullaby 2-sided crib mattress over to provide cushy comfort perfect for the active toddler .Antibacterial， waterproof lock stitched binding helps prevent mold， mildew and odor from seeping inside like cotton binding allows.

2 Hypo-allergenic layers offer cushioned comfort for infants and toddler.6-gauge steel border wire around perimeter of mattress. Lightweight; 224 interwoven， heat tempered coils offers a firm foundation and excellent support.

Reinforced- waterproof cover and binding resist liquids and stains. Fits all standard size cribs and toddler beds for years of use. Wipe clean with mild soap and warm water.

Passes all Flammability tests (16 CFR 1632 /1633) and also pass phthalate， lead and toxicity tests. Dimensions: 52" Lx 27.5" Wx 6"H