The new 2017 higher spec version of the inflatable which has a 170N interlock bladder partnered with a UML Pro-Sensor indicator inflator mechanism. It has a Indicator Window to show you that your jacket is good to go. Comes with stainless steel adjustment system and D ring. The outer cover has a soft neoprene neck for more comfort plus a mesh back for improved fit and comfort, Integral crotch strap with stowage pouch. It also features a spray hood in both models.