Technical Features: Technical Features: The chassis of the sprang (2.2 mm) is thermally treated against rust and landing. The frame of the steel wire surrounds the chassis of the sprocket to install the chassis against the pressure factors. A layer of felds on both sides to increase the hardness of the mattress and prevent the sensation of the swast. Two layers of high density sponge of both sides free of calcium carbonate has a high flexibility. Knitting Fabric Weight 180 g Beaded with white sponge 8 ml handle against bacteria and bedding insects. Height of 23 cm 3 years warranty