The Countess Support Revo Foam Mattress features a 5cm layer of Revo Foam, the 4th Generation in foam technology and the successor of the UK's current favourite, memory foam. Benefits include:BreathabilityWide open cells with thicker walls for enhanced durabilityAirflow is 30 times greater than a premium visco elastic mattress4th Generation technologyResilienceOptimum comfort and support through the use of highly resilient, high density, full depth Revo Foam technologyTested to BS EN ISO 8307.2007 - The determination of resilience by ball reboundRevo mattresses have a resilience associated with a premium pocket sprung mattressHeat dissipationProven to wick moisture and dissipate heat away from the bodyContributes to a cooler, sounder sleepRevo Foam cools faster and is proven to wick moisture and dissipate heat away from the body. The airflow is 30 times greater than a premium memory foam mattress, prolonging the life of the mattress and keeping you cool. This mattress is highly resilient, exceeding the quality of a premium foam mattress and matching the quality of a premium pocket sprung mattress. The cover is removable and washable at 40 degrees.This mattress is made in the UK and comes with a 5 year warranty. It is dispatched vacuum packed and rolled.