The Aspire Furniture 20.5cm deep 7 Zone Natural Bonnell is a bonnell sprung mattress containing double comfort fillings, an air conditioned Aspire-cool touch 7 zone pressure relief sleep surface and airstream memory fibre wool foam making this a premium value mattress The mattress is available from single to king size. Mattress: Get a grey border 7-zone cool memory wool sprung mattress. Hybrid mattress: Features a Bonnell sprung open coil system and three layer double comfort design with wool and memory foam for extra comfort and support. Cool touch: Plus an aspire-cool touch AC sleep surface. Features: A luxurious pressure-relieving design for the best nights sleep. Made in the UK: Made in the UK and delivered rolled.