The 911 BC was introduced in 1997, in response to many requests from Public Safety divers for a system designed to fit their needs.It is based on the Tech BC platform, with a twin buckle front closure, but has additional features. These include SOLAS standard symbols on buckles, reflective trim on the bladder, additional Drings, pockets for long octopus hose storage on each bladder wing, and an included split saddle harness.The 911 has been proven to be a durable and flexible platform by a large number of public safety agencies. Contact your Zeagle dealer for more information. PFS sizing system Single or twin cylinder capability Two double pull waist buckles in front 1050 Denier Ballistic Nylon 65lb lift Ballistic bladder 36lb capacity Ripcord weight system 20lb capacity rear trim weight pockets Adjustable sternum strap Four Drings on shoulders, two adjustable Articulated shoulder to reduce binding in the underarm and chest area as well as increase freedom of movement 11" spaced grommets for mounting twin cylinder backplates Two zippered utility pockets Full lumbar pad Six stainless steel Drings on vest SOLAS reflective symbols on buckles Reflective 3M ScotchLite trim on bladder Split saddle strap Two hose storage pockets on the bladderSAR and 911 XS size has a 20lb weight capacity Ripcord System, does not have cargo pockets over the weight pockets, and can use single tanks only.