US Patent 9918558 Mattress with an air flow channel

A foam mattress is provided having a body facing surface comprising a first foam layer on a first spring layer formed of a plurality of individual pocketed spring coils. A second foam layer formed of a reticulated foam supports the first spring layer. The foam mattress further having a bottom layer of conventional foam. The foam mattress is surrounded by a foam casing that has at least one vent formed in the casing. The first spring layer causes air to flow from the second foam layer through the vents.