Luxury, visionary design. Optimum support. Our highest ever spring count offers more personalised contouring and supports pressure relief. Enhanced elasticity. A double layer of Simbatex foam. For more luxurious cushioning and comfort. Innovative FusionCool. Our own blend of kapok, wool & bamboo for an extra fresh top layer. Boosting PureLift. A unique blend of latex & coconut for superb support & breathability. Made in the UK. In specialist mattress factories.The Hybrid Ultra also features our SupportCore base, with 1,000 pocketed barrel springs to ensure edge-to-edge support. 3,800 titanium alloy Aerocoil micro springs sit in the upper layers. You won’t be able to feel them, but they compress individually in response to your body, 2,500 high carbon steel Aerocoil micro springs sit further down the mattress to maximise support, gently pushing fresh air through the mattress as they compress.