IsopassTM is specifically recommended for clean environments like supermarkets, the food industry, cool rooms and humid areas. The door frame is manufactured from extremely rigid glass re-inforced polyester material. Fyrther more the higes are available in stainless steel to maximise hygiene and service life. IsopassTM door leaves are made of transparent hard wearing, resistant and flexible PVC. Door leaves are also available in a combination of 2 or 3 zones. Options include opaque or colours of orange or grey. Each door leaf is fitted with a powerful activation mechanism, having two double acting spring hinges. The door operates equally each way providing relaible self-closure. The IsopassTM Impact Door is an aesthtic and effective corrosion free tool in the use of energy and draught control.