Never come across the bags, but my Flambeau black ABS secure ***** cases ( a bit like hard cases for guitars but designed to carry guns) have Zerust inserts guaranteed to protect the contents from rust for five years. I bought them 8 years ago, have used them outdoors in all kinds of weather, stored them externally damp from rain and snow in cars and outbuildings from time to time and to date, no rust on anything carried in them - not on the guns themselves, or steel tools, accessories or ammo boxes kept inside the cases. I'd certainly consider the bags for storing nice steel bikes say, in a basement or shed.