Disclosure: The manufacturer has offered a free gift for a review, which I am accepting. I ordered these without knowing about that, I would have given this same review regardless of any compensation, so the manufacturer could have saved the gift. ? The offer was for a travel shoe bag, and, based on the quality of these compression bags, I was excited to get another quality product from this company. I will be purchasing another order of this product, without compensation.Super impressed with these little gems. I bought them for use with my Eagle Creek 40L Global Traveller backpack. They are incredibly lightweight, and when empty, rolled up, and stored all together, take up just a few flat inches of space. I was impressed with both the ease of compression, very little "squeeze"and pressure needed to compress, and the compression capacity. For example, I can fit three pair of heavy sweatpants in one, in the compression mode, or two large long sleeved thick corduroy overshirts, with a medium stack of undergarments. The small bag can fit two large microfiber absorbent yoga towels (24"x63" ) I can fit four of these larger bags in my Eagle Creek 40L backpack, plus the smaller bag. They are also great for regular travel, since you can unzip them and expand them even more, yet they still remain sleek and compact. The zipper has held, so far, under the squeezing pressure that I have put upon it, when compressing, and I especially love the heavy duty carrying handles. These are exactly what I was hoping that they would be. The only thing that I would like to see different, is the color. I would love to have them come in plain dark black, with black handles. Other than that little "picky" detail ;-), I would absolutely recommend them.