With a Good Housekeeping Institute's Getting Greener award, the Silentnight Sofia is a truly award-winning mattress! Featuring 1200 individual Mirapocket springs, you'll get medium-firm support exactly where you need it most. Enjoy heavenly comfort that doesn't cost the earth: Eco Comfort Fibres&trade are 100% sustainable so your mattress cares for you - and the planet. Clean and fresh, the Sofia is also hypoallergenic for your total peace of mind. It comes complete with a 5 Year Guarantee and Free Next Day Delivery. The Sofia simply has everything you need for the perfect night's sleep - every night!