The covering is in an exclusive LIGNE ROSET ticking (100% cotton), and is removable and dry-cleanable. Ticking treated with `HealthGuard' (antibacterial & fungicidal). Pairs of mattresses are in two parts, that are attached by means of zip closures. The ticking is quilted with 200 g/m2 polyester material on one side. The Bultex density is 38 kg/m2.