My VFD is looking for 2-4 quality EMS backpacks that will hold a D sized O2 cylinder along with BLS (EMT-B level) gear for our wildland trucks. The bags would spend most of the time in the truck, but the potental exists to grab it and hump into the woods where somebody droped or got hurt/burnt. Right now we have a cheap gals bag, but the trucks go on remote fires along with national wildland dispatches. Any recomendations?????