Here's a more utilitarian product that everyone needs: a 100% waterproof duffel bag. I can't tell you how many times camping I wish I had one of these things. (When you camp in Fall or Spring, rain is always on the table in the Midwest. Always.)
This Aqua Quest Water Duffel is quite handy. You'll never have to worry about laying your bag on the ground, as the company claims that "no amount of rain, snow, dirt, sand or dust can penetrate this bag". You're good under any circumstance except full water submersion.
It only weighs 2.2 pounds, and it's made with some super durable fabric and with lamination, DWR coating and welded seams. The bag has also been getting some serious love on Amazon, netting a 4.8/5 stars from 50 reviewers.