The exterior of the case is made out of neoprene, which makes the case almost perfectly waterproof–more about that in a minute–but you’ll also get an interior lining (that at least feels a lot like fleece) which should prove sufficient to keep the item inside protected against scratches and without too much concern about static buildup. You’ll get the standard Quiksilver closure system as well, complete with two zippers to make sure things close as tight as they can.
When I hear the word waterproof or water-resistant–even “neoprene”, which thanks to its use in wetsuits has that connotation–in connection with anything, every last one of my skeptic senses starts tingling. So I have a test I like to use for this sort of thing, involving a shower and toilet paper. Toilet paper–the thin paper–easily shows when even a drop of water hits it, and the shower provides plenty of water. Turns out that the Quiksilver Neoprene Sleeve Echo Beach offers terrific protection (the paper emerged dry in the midst of the shower) but the weak point here remains, as neoprene sleeves often have, the zipper. Keep the zipper area out of the water as much as possible and you’ll have terrific protection here.
And considering that you can get one of these for $39.88 out at Amazon, you’ll have a terrific source of protection for most any kind of hardware you’ve got, as long as it’s sufficiently small to fit in the case. Basically, with a little care and a little cash, the Quiksilver Neoprene Sleeve Echo Beach will provide excellent protection for your smaller hardware.