Fasten Italia has specialized in recent years in the production of closure systems for mattresses. The polyester closing system Flex6 is particularly deidcated to the production of mattresses or any other type of upholstered prodcuts. Its main feature is the high toughness and tensile strength, both transversal and longitudinal, in consideration especially of A minimum thickness with which it is realized. Thanks to the particular shape of the teeth that compose the chain, it is also suitable for mattresses packed in vacuum. The small number of joints presents in the product improve industrialization in the sewing stages of zippers using automatic machinery.