The Foam Bunk Mattress by Silentnight has innovative Miratex foam and a soft knit cover to help provide the support and comfort your child needs as they sleep. With a slim, lightweight design, this is the perfect mattress for a bunk bed. It's hypoallergenic for extra peace of mind and comes complete with Free Next Day Delivery and a 5 Year Guarantee. Dimensions: 3′ x 6′3″ (90cm x 190cm)