Jrc stealth bloxx bivvy this jrc stealth bloxx bivvy is a smart compact shelter has a centre block where the 5 ribs and the peak bars are all connected because all the ribs fold out in an accordion like manner which makes the tent ultra fast at setting up jrc stealth bloxx bivvy detachable front that transforms your bivvy into a day shelter 10 000hh hydratex waterproof material lightweight centre block design for ultra fast set up 2 way door system large back vents