The Sentinel A50 Air Helmet is now obsolete and has been replaced by the Sentinel A60 Air Helmet (0700 600 861)This Helmet comes with four FREE outer lenses (2 x clear & 2 x amber) and Helmet Bag(To be used in conjunction with ESAB EPR-X1 PAPR Unit - 0700 500 900 or ESAB PAPR Unit c/w 1m Hose - ..