Mattress composed of 2 superposed rows of barrel-shaped pocket springs. Height of core: approx. 25 cm (overall height: approx. 32 cm). Springs are made from induction-hardened steel (for lasting springiness and a long lifespan). Clad in comfort foam. Integral aeration system for optimal air circulation. Stable construction with integral reinforced seat. Hypoallergenic, flexible ticking (59 % viscose / 41 % cotton) quilted with lambswool (500 g/m2) and breathable fibres (200 g/m2) on both sides. Covers of 2-part versions may be removed separately for dry cleaning. Single-needle stitching. 6 handles in matching fabric to assist with turning. Integral aeration holds located behind handles. Removable jersey mattress protector (41 % cotton / 28 % polyester / 31 % polyamide) is washable up to 60°C.