Just a little video detailing a few options for storing/separating your gear. Apologies if the terminology is confusing sometimes. - Stuff Sack: Just a Nylon bag with a drawstring closure. Great for storing wet/dirty items since the material does not allow moisture to pass. This is the cheapest option if you don't care about the closure. - Compression Sack (Ziplock-type): Basically a plastic sleeve with a Ziplock-type closure. You put bulky items like clothing inside, seal it, and then roll the bag to force air out of the bag. It saves you some space and is waterproof. Best used for items you want to keep flat. - Compression Sack/Bag: Same as a stuff sack but with a lid that is attached to the bag with compression straps. Allows you compact your items. Often offered with higher end sleeping bags instead of stuff sacks. - Dry Bags: Like a stuff sack but with a special closure that you roll up and then seal with a clasp. It doesn't compact quite as well as a compression bag but you have the benefit off it being truly waterproof.