Immerse yourself into a heavenly slumber with the Silentnight Just Calm ReVo Hybrid Mattress. Designed with 1000 Mirapocket® springs that truly enhance the quality of sleep. The smart springs react independently, contouring around your body shape and distributing your weight evenly. They have a zoned design that provides extra support to your hips, shoulders and lower back. This mattress also contains a layer of high density ReVo™ foam. The special foam has an open cell structure which reduces body heat and improves air circulation. The Just Calm also has a foam-encapsulated edge border. The edge is finished off with a supportive foam border which enhances the durability of the mattress edge. It also provides a maximised sleeping space, so you can sleep right to the very edge. Delivered rolled and comes with Free Next Day Delivery.