Joy Walker Waterproof Backpack Rain Cover, 10000mm Waterproof Level, Upgraded Anti-Slip Cross Buckle Straps, Four Strengthened Layers for Hiking Camping Traveling

I was a little worried when I purchased this. I’d never heard of this brand before and oftentimes cheaper products don’t have as good of quality. I was pleasantly surprised when this came in the mail. It is thin and leightweight. The edge is surrounded with an elastic band, similar to a shower cap or hair net, but seems to be well stitched. I don’t foresee it breaking easily. I have the women’s osprey Fairview 55 which is a 40 L pack with a detachable 15 L daypack for 55 L total when zipped together. I purchased the XL cover so there would be enough room for the total size of the pack, plus room to attach a compression sack with a sleeping bag and pad on the outside, because having a dry pack but a shopping wet sleeping bag defeats the purpose of a rain cover completely. To test it out (I haven’t actually used it yet) I filled the pack and added the compression sack to the straps on the bottom. The XL covered the pack and compression sack perfectly. I also tested the permeability using the sink and I’m happy to say no moisture got through the cover. I even let a puddle of water sit on the cover for several minutes and not one drop of water seeped through. I’m confident this will keep my belongings dry, even in a downpour. I’ve read several reviews saying that it doesn’t have straps to hole the cover on. However, the XL came with two, one horizontal and one vertical. They were adjustable which would allow it to be tighter if my pack wasn’t full or if I didn’t have the compression sack attached. It folds down really small and doesn’t take up much room in my pack when. It being used. I imagine it could be compressed even further if necessary, as the carrying case it comes with does so anyhing to keep out air or compress it at all. Even at that, the XL carrying case is only about the size of two pairs of hiking socks and could be flattened to probably half that size. I’m very happy with this purchase and highly recommend it. I plan to buy a smaller one for the detachable day pack.

We used the Medium rain covers in multiple days of rain while in Scotland, one of them on a hike in which the rain was hard-driven by tons of wind. Our backpacks always came out perfectly dry at the end of the day; and it is worth nothing that on the hard-driven rain day that even though my backpack stayed perfectly dry thanks to this excellent cover, my rain paints allowed moisture to seep through since the wind caused the rain to permeate my rain pants.One key part of keeping my pack dry IMHO is the clip and cinch straps that this rain cover uses. As opposed to a simply drawstring (that some competing packs offered and which I tried on at home in comparison), the clip cinch mechanism worked perfectly to keep a tight fit over the pack, offering more coverage over the portion of the pack that touches my back than did other covers which used drawstrings. Prior to using this pack I had incorrectly feared that the clip/straps on my back while hiking, but what I found was that as long as I oriented the rain cover such that one clip receptacle was at the top of the pack (as opposed to the bottom of the pack), that I happily never felt any of the clips or straps while hiking.Also, the rain cover was very easy to put on and to remove. I'd highly recommend this rain cover.----TLDR---A week prior to embarking on a 3+ week trip to Scotland&Ireland in October, I was told that I had better get a rain cover for my backpack/daypack because hiking there will involve frequent hard-driven rains.I bought three different rain covers and at home I did a fit-test over my fully loaded daypack (a 32 liter Osprey Skarab 32) and over my wife's somewhat loaded 28L Osprey Skimmer 28 as well (I say somewhat loaded because she never packs her pack as full as I pack mine, and her pack is also smaller, so we wanted to make sure that the medium wasn't too big for her pack....it wasn't; it fit both our packs perfectly). The Joy Walker MEDIUM offered the best fit and the best coverage due to it's dual click and cinch straps (as opposed to the drawstring method offered in some rain covers).FYI, the three covers that I purchased and tried on our packs at home were:REI Co-op Duck's Back Rain Cover XS (it fit the pack, but the drawstring cinching mechanism allowed more areas for wind-driven rain to get into the pack than did the Joy Walker's clip and cinch mechanism)Joy Walker small (too small for a fully loaded 32L pack)Joy Walker medium (perfect size for my 32L pack and for my wife's 28L Osprey Skimmer)

Thick material seems extremely durable. No visible wear after laying it on rough ground. I have a rear-opening backpack, so this rain cover is also a ground layer, protecting my bag from dirt, poison oak, & muck.Great seams & straps. Lightweight. Easy to use — just chunk it on your bag & clip the straps if necessary. Functions as designed. Big enough for my 40-liter rolltop, with accessories including a monopod & tripod.