Unlike other mattress manufacturers, Vi-Spring produce all of their own springs using supple alloy coated steel coils that adjust to the body while retaining their original shape.At the core of each mattress, 960 hand-nested calico pocketed springs are able to freely move independently from one another providing a supportive night's sleep that moulds to the contours of the body.To ensure optimum comfort, the springs come in a choice of tensions from soft to firm, to suit every kind of sleeper.Around this honeycomb structure, Vi-Spring fill the Regal Superb with a mix of the finest quality materials including a layer of ultra-resilient horsetail that enhances the bounce of the springs.From the inside out, the materials are layered in a specific order of platinum certified British fleece wool, Turkish long-fibre cotton, Austrian horsetail and hand-teased platinum certified real Shetland wool before being upholstered in an exquisite Belgian ticking with matching piping.While inferior qual...