Wonderfully comfortable and supportive, the hypoallergenic Sealy Activsleep Memory Pocket 2400 mattress offers the support of pocket springs plus memory foams body-contouring comfort. Designed to perfectly adapt to your body, this 27 cm deep medium feel mattress has a unique spring system with 2400 springs in king size 1000 twice tempered springs for support plus 1400 individually-responsive mini springs. A thick layer of memory foam provides comfortable pressure relief. Sealy Smart Fibres make for a fresh and cool sleeping environment, and hand tufting adds an extra layer of support. Its also perfect for allergy sufferers as the cover is infused with Purotex, which introduces friendly bacteria into the mattress to eliminate allergens, and Adaptive to wick away moisture. Handcrafted in Britain, the superb Sealy Activsleep Memory Pocket 2400 mattress is part of the Sealy Activsleep Memory Pocket collection of mattress and divan sets. A Furniture Village online exclusive. Did you know?: The mattress should be aired for four hours after delivery to freshen and remove any aroma from storage. It may take time for your mattress to attain its full size once the springs have settled to the correct position. This is due to the mattress being upright during transit. Settlement of fillings and indentations caused by body weight compressing the fillings are natural and not considered defects. This can be minimised by regular rotating (unless yours is a dual tension mattress).