Top of the toppers is our HCa option. This decadently sumptuous creation incorporates deep outer layers of pure cashmere wool, which encase two layers of premium curled horse tail around a lambswool core. The top and bottom panels of the case are made of the same cotton stretch fabric used on our No 1 mattress, to ensure that you really feel the luxury of the pure cashmere. This lavish topper is typically supplied with the No 1 bed, but can, of course, grace other models.