Molain 10 Pack Backpack Rain Cover, Disposable Waterproof Lightweight Backpack Cover Elastic Covers Protector Disposable Rain Covers for Backpacks Outdoor Hiking Cycling Camping Travel Emergency

We just used these on an international trip, for backpacks we put under the seats on our flights. My wife used two of them to completely cover her backpack. They are thin and single-use only, which is fine with us. It's a 10-pack; carry as many as you need...they take up zero space in your bag until you pull them apart for use. If you pull on them too hard when putting them on your backpack, they will tear. These are not meant to be permanent, reusable covers. If they were, they would be a lot heavier and more expensive.

Rips very easy

These are lightweight, disposable-style rain covers that work best for short-term use. I tested one on both a backpack and a more boxy container to see how it handled different shapes. It stretches enough to fit over larger or irregular items, and the elastic edge helps keep it in place. Coverage is decent, though the fit is a bit loose and not form-fitting. The material is quite thin, so it’s better suited for light rain or emergency situations rather than repeated or heavy-duty use. Overall, these are useful to keep on hand for quick protection, just with realistic expectations about durability. These are great as a backup—just not something I’d rely on for long-term use.

Kind of love these lol. They come like the pinch-hitting shower caps you’d find supplied at a highway hotel. Like a crinkled plastic strip, then you pull it part and it expands into a capable temporary waterproof cover that could be reused a few times before losing elasticity. These are larger to accommodate backpacks and such, and the quality of plastic is a a little thicker than a shower cap. These are *very handy* to keep in a bag or something just in case, especially if you’re in NYC or something; they take up no room. At $6.99 would recommend.