Very secure - Blue Force Gear Tourniquet Now! Strap Empty

Like others say, must be fully molle'd to something (through both loops) or else it will rotate and bind when you try to retrieve. However, if it is secured well to a belt, pack or other, it holds a tourniquet very well. Keeps it in place during running, jumping and rolling around. I find it easy enough to retrieve one handed though, so not too tight.