Another handy hint: if you use your bags outdoors or in the damp empty a can of Scotchgard into whatever you put in the bags and they become completely moisture resistant. Got this from my neighbour (he's a deer-stalking, fly-fishing merchant banker type) after he left his rest bag in his car over a long wet weekend and the rice expanded, split the bags, poured out all over the floor and attracted rats. Many rats. And it was a new Range Rover. It isn't new any more.