Premier Pocket 1350 Silentnight. The Premier Pocket is a luxury, pocket sprung mattress made from top-quality organic materials that will lull you into a naturally deep sleep. The top layer is made of silk and has been treated with a probiotic called Purotex®, a 100% natural solution to mould and household dust mites. The filling is a combination of cashmere and lambs wool, which produces quite a firm tension that is sure to keep you warm and cosy all night long. The mattress also contains Silentnight’s unique Miracoil® spring system, which includes a network of 1350 individual pocket springs that adaptively support your body to preserve the spine’s natural S-shape, relieve pressure points and prevent 'roll together'. So buy this Premier Pocket 1350 Silentnight Now £445.00.