3M Versaflo Easy Clean Backpack, TR-927 is for use with with the TR-300+, TR-600 and TR-800 PAPRS. The backpack has smooth surfaces and can be disassembled to allow for easy cleaning. The backpack is designed to securely hold the Versaflo PAPRs during use. It is comfortable and designed to be perceived as balanced when carried. Also, it has versatile adjustability for a comfortable and stable fit and can fit a variety of body sizes. The design helps to minimize contact with the back to help with ventilation. When used with the TR-300+ PAPR the system is IP53 rated and when used with the TR-600/800 PAPRs it is IP54 rated. The backpack does not contain free silicone or natural rubber latex components.