Durable Waterproof Drawstring Dustproof Storage Bags 4-Pack - Perfect for Camping, Travel & Outdoor Gear Organization

Bought these to be better organized while backpacking, esp for longer trips in the woods.They are much better than expected -- durable material, stitching, and cinch rope. They definitely aren't waterproof, but may be slightly water resistant due to the thick synthetic material.We got the smallest size (7" diameter x 15" length i believe). For that size, you can easily fit a couple in the main compartment of a 55-65L bag.We use these to stow clothing (one bag will fit at least a couple of nights worth of backpacking clothing, down gear), food (a good amount, at least 2 nights worth for 2 people), and random accessories / gear.It's strong enough to tie up and hang from a tree from the cinch if you're trying to keep things away from bears in the back country.Note that this small size is NOT to be used for anything larger than the most lightweight down sleeping bag. You won't be able to fit a synthetic bag in these. Maybe a larger size will fit a very small synthetic bag, or a slightly larger down bag. These are not sleeping bag sacks (although they could be used as such if you're careful) -- so be cautious when ordering.