Backpack rain cover
Sea to Summit Ultra-Light Packcover - Extra Small - REI.com
I figured x-s size from lxhxw inches cubed into liter converter on duckduckgo.com. Its got a tiny little carrying case attached to it. And the 5th of 5 feedbacks was a motorcyclist who said to velcro it to keep from parachuting. $39 with shipping and CA tax, but it fits perfect on my Axio hard back packs and is waterproof and stores in less than 1/2 my fist size.
Last edited by kawdog; 01-26-2016 at 02:26 PM.