The Silentnight Sorrento Eco 1600 mattress offers a breathable night\'s sleep whilst using materials that do not harm the environment. A combination of 1600 pocket springs and a sustainable EcoComfort Layer of recycled plastic bottles ensures a refreshing slumber. A Coolmax surface aids the evaporation of possible moisture, making it the ideal mattress choice for hot sleepers. Mirapocket support relieves spinal tension and distributes weight evenly, welcoming you at the end of a long day. Eco+ Ultraflex comfort - Eco-friendly mattress with sustainable fibres for a breathable and refreshing nights sleep, combined with a layer of Ultraflex mini-springs for enhanced comfort. Ideal for planet savers. Mirapocket support - The Mirapocket support system offers even weight distribution to assist easy movement and improve alignment for an undistrubed nights sleep. Flame retardant without the use of any chemical treatments. The mattress firmness rating is Firm but please note that this should be considered as a guide only. The firmness of your mattress is entirely a personal decision based on your comfort and support needs. Single sided Firm mattress 5 Year Guarantee Made in the UK No turn mattress Dimensions: Single W: 90cm L: 190cm D: 30cmDouble W: 135cm L: 190cm D: 30cm King W: 150cm L: 200cm D: 30cm Super King W: 180cm L: 200cm D: 30cm.