Deuter Raincover I (20-35 L) is a good product that does what it's supposed to. Nice bright colour, and fits my Guide 34+ pack like it should. It's got a drawstring closure, that comes out at the top of the cover. The end of that drawstring, I tie to the drag handle on the top of my pack. So if the raincover should come off for any reason, it will still be tied to my pack, and not get lost. And although I use drybags to pack my stuff inside my backpack, a raincover is an easy and cheap way to make sure my pack don't get soaked in a heavy downpour. A good product from Deuter.