I have purchased several other Red Rock products (small duffle bag, pistol holsters, ammo magazine pouches) and have not been disappointed in any of their products. There is no exception to this assault pack. This assault pack is just what I expected. That said, this is not a 3-day tactical bag or a "bug-out-bag". It is a darn good one day camping or one day hiking bag. It has plenty of room and handles a reasonable weight load. My primary use is to take to the gun range. I have put three semi-auto pistols in tactical holsters (2 each 9mm and a .40 cal); three magazxine pouches with three loaded mags in each pouch; two pair of shooting glasses; two pair of ear protectors ("mickey mouse type); two mag loaders; a Leatherman multi-tool; four boxes of 50 rounds each 9mm/155gr; and 2 boxes of 50 rounds each .40 cal S&W/165grs. I also have 4 small MOLLE pouches (two on each side) with a set of small pistol sized laser sights in two of them. I still have room for more ammo or other items. The zippers are good quality and the seams are double stictched. It's constructed from 600 denier nylon with a vinyl liner inside on all the surfaces that face outward. I do not believe it is waterproof, but probably water resistant to some degree and would keep light rain from getting inside while being worn. I did a lot of research looking for a bag that I could use to haul my stuff to the gun range. You can pay a lot more for nearly identical pack but at this price point you cannot beat it in terms of quality, size and weight capacity. In my research, I looked at a lot of Youtube video "reviews" of this pack and I have to tell you there are some really incompetent "reviewers" out there. One that really caught me attention was a very young man that claimed this particular pack's seam were unravelling. His "proof" was a small thread that was sticking out at the end of a sewn seam. What it actually was, was the end of a stitch where the seamstress cut thread off from the sewing machine.