The Ullswater Natural Silk 2900 has a combined spring count of 2900 from the pocket springs in the heart of the mattress and mini pocket springs in the pillowtop that help distribute weight evenly, minimising pressure on the body and resulting in an undisturbed night\'s sleep. Cashmere and silk elevate the levels of plush comfort in this truly sumptuous mattress. 2900* Pocket Springs - Pocket springs move independently and so provide the best postural support. The individual pocket springs follow and support your body shape and weight. *King size. Firm Edge Support - Firmer springs along the sides add strength to the edge of the mattress to allow you to use the whole surface of the mattress as a sleeping area. Available in one tension only. Pillowtop Layer Featuring Mini Pocket Springs - A soft comfort layer above the supportive mattress featuring mini pocket springs for further postural support. Deep Soft Layers - A dust free filling providing softness and resilience. Cashmere and Silk - Cashmere hair and the finest silk fibres are blended into a durable insulation layer. This layer also provides a supportive feel. Cotton Blend Layer - A combination of cotton and luxurious soft white fibre is formed into a deep layer for guaranteed quality and softness. Cotton Rebound Layer - This cotton layer is designed with responsive rebound properties that complement the pocket springs to help provide the most comfortable feel. No Turn - No need to turn the mattress, although regular rotation will extend its life. 3 Rows of Side Stitching - Provides a more robust mattress border than a standard mattress. Traditionally Hand Tufted with Wool Tufts - This traditional skill ensures all loose fillings are secured to provide the perfect finish to your mattress. 8 Year Guarantee - For your peace of mind, Relyon offer a 8 year guarantee on all mattresses purchased with a divan base. Mattress Dimensions: Single 90 x 190cm Spring Count 1611 Small Double 120 x 190cm Spring Count 2237 Double 135 x 190cm Spring Count 2500 King 150 x 200cm Spring Count 2900 Super King 180 x 200cm Spring Count 3507.