I bike 60 miles round trip to work a day rain or shine. I'm looking for a new pack to put my change of clothes, papers, and sometimes laptop in. Would the 35l be a good choice?

I didnt see a weight on Backcountry. Any idea how heavy this is?

I realize I am weighing in a little late in the conversation, but SealLine also makes a commuter dry bag/backpack the Urban Backpack. It has the dry bag weather proofness with a little more backpack comfort.

Good point, Jesse. I was considering that very issue last night when it came to top loaders. For that reason, of the Stratos Series packs, I would narrow the choice down to the Stratos 34, since it still has good volume, but is a lower profile panel loader.

The problem with using normal day packs for cycling is that the back of your helmet will likely collide with the top of your pack, as most 30+ liter day packs utilize an internal frame. I tried using my Deuter 30 liter Futura Zero pack--but couldn't ride at all because of the horrible helmet/pack interference. So, make sure whatever you decide on is not too tall (which means you'll likely have to choose a pack without a frame). I'll tell you what I eventually did: I switched to panniers, and I haven't looked back.

Donald has you covered on the weight, but as to suitability of purpose and comfort, I'll give it a shot. It's obviously going to give you the volume and waterproof performance you'll need for the rainy days, and it would be "comfortable" in the sense that it's not going to be painful to wear or anything, but since it's not really intended for anything beyond gear storage and comparably short portages of considerably less distance than 30 miles at a pop, or cycling, you do have better options. My thought would be to go with a more form fitting pack that's going to offer a stable load carry, hydration capability, a ventilated back panel, and a built-in rain cover that you can pull out only when you need it. Off hand, I would look at the Stratos Series packs from Osprey. All the features you need, and a variety of choices in volume that I believe run from about 24-36L. Much better suited line of packs for what you're looking for. Hope that helped.

great thanks. Is it comfortable?

The 35L weighs 1lb 14oz.