Do you know what sleeping on memory foam feels like? You will never want to go back to a regular mattress again. Memory foam is one the most comfortable comfort layers for beds and is an affordable and highly regarded material used for rebounding comfort. Originally developed my NASA there are very few downsides to memory foam with the only notable one focussing around temperature regulation, this is because memory foam does not breath particularly well. In order to offset this, many mattresses of this calibre come with additional vents and other breathable layers to assist those that would otherwise find themselves getting too hot.