Waterproof Backpack Rain Cover (15-80L) Upgraded Triple Waterproofing with Adjustable Anti Slip Buckle Strap,Wear-Resisting and Durable,for Outdoor,Hiking,Camping,Cycling (Black, M (30-40L))

Had used this in the rain and was happy all my items stayed dry along with my big umbrella

Perfect for walking college students. Still durable after 2 years. Covers a big backpacks and protects valuables like your laptop. No seepage. I recommend!

So far, so good - I like that it's so adjustable, with a horizontal adjustable strap and vertical adjustable strap. I haven't had it in the rain yet, but it's Oregon, so I guess it'll be a few hours until testing is complete -_-

Go bag rain fly

I am from Costa Rica where rains 9 months at year and I have to say that this cover works great. 100% recommended.

Seems well made. Bought it for a 40l osprey farpoint. First got the 40-50l cover, and it was too tight. Then got the 50- 65l cover and it fits perfectly.

Great product. Attached securely with straps. Covered pack nicely and shed water perfectly in rain. Also has a nice compact case which can attach to outside of pack if desired. Would buy again.Be careful with sizing though. Rather than rely on pack volume (liter rating), I measured my pack's height, width, and thickness, and selected the size slightly exceeding my pack's measurements, thus choosing the L(40-50L) cover for my largish 30L pack. It fit perfectly.

Good

The cover fitted my 80L bag ! Definitely does the job, I cannot say for the waterproofness since it did not rain during the trip. It allowed me to overpack my backpack and keep my stuff protected when the bags were in the hold of the airplane.

Great to have in your backpack just in case and twice I had to use it. Everything stayed dry.

I bought the XL, per description fits 50-65L. I have an Osprey 55L XS( actual size 52L), and the longer strap is too short for the bag! Please do not trust the sizes and the description and AVOID buying this product!