The 10-inch Double-sized eve mattress is made from the next generation memory foam. Manufactured in the UK using only local materials, every eve mattress comes with a 10 year warranty and 100 night trial. Shipping is free, and eve mattresses are delivered in a box within 3 days of ordering. If during the 100-day trial you decide eve is not for you, we_ã_ll come around and pick up your eve hassle-free and with no questions asked, and offer you a full refund. Because eves can only be bought online, this mattress costs 1/3 of what an equivalent mattress would cost on the high street. Eve mattresses can be bought to fit all sizes of beds in the UK, including Ikea bed sizes. The eve mattress comes in single, double, king, super-king and emperor sizes, in both UK and European (IKEA) sizing.