Jon Buoy Horseshoe Mk3Jon Buoy Horseshoe Mk3 The Jon Buoy Inflatable Horseshoe is a direct replacement for the traditional horseshoe lifebuoys. The compact unit comes fitted with an oral tube retro reflective tape, whistle, and an automatic inflation system as standard. An automatic light is an optional extra that can be fitted to the horseshoe. The weight of the pouch allows for an accurate throw to the casualty. Jon Buoy Horseshoe Key Features : Automatic inflation Retro