Rest deeply and soundly on this plush hybrid mattress that is designed to keep you cool, comfortable and tranquil all night long. This mattress is ideal for any living situation and arrives compressed in a box at your doorstep so please allow 48 - 72 hours for complete expansion. Our mattress foam is CertiPUR-US Certified, so it's free from heavy metals, phthalates, BPDE, and formaldehyde. This mattress is compatible with trundle beds, platform beds and adjustable bed frames, when using with a standard bed frame a box spring or other foundation is required.