You may think of Jon lines as equipment solely for use by technical divers during prolonged decompression stops, but recreational divers have discovered what a useful piece of equipment this can be for avoiding fatigue during their own safety stops. With its many practical and convenient features, the IST JL-1 Jon Line, 7 feet of Attached 1 Inch Wide Nylon Webbing Lanyard, Storage Pouch is a big step up from a homemade Jon line or plain cord tie-on.