Waterproofing sprays and powders help, but if it's going to be raining, you need to cover them with a plastic bag or a catquiver. I like a plastic bag from the grocery store, then, over that, a fleece or wool fletch cover with elastic straps that tie to the quiver. 100% waterproof, quiet, and durable for walking through brush. It works with both hip and bow quivers. If the rest of your equipment will allow it, a cat quiver is completely waterproof and puts your fletch up out of the way of the brush.