These pants are a constructed in Bangladesh of Travex, a medium-weight stretchy fabric (label states 96% nylon & 4% elasthanne). The cargo pocket flaps are closed with buttons, which some reviewers did not care for. Dealing with the buttons was at first a bit of a time consumer, but I liked the way the heavier flap stayed flat and in place when I didn't bother buttoning down the flap (whenever the pocket held something of little value, such as a handkerchief or a paper map). When I used the pocket for carrying something of value (e.g., small amounts of paper money), I just used one button. I think using both buttons could be reserved for situations when pickpockets are very likely to be encountered. The two rear pockets feature zippers. I am calling the sizing moderately large, but it may just the fabrics stretchiness that make it so. I wear 36 waist denim jeans and they can be snug. These pants in a 36 waist feel loose. I tried a 34 waist but that proved too snug, so I wore the 36-waist pants on my trip to India. The pants worked fine for comfort and utility in the airplane and airport, but would have been too warm for daytime Delhi in early April (temperatures probably well into the 90s F). I wore them as field pants in the cooler eastern Himalayan foothills and mountains at elevations as high as 13,700 feet, where they were great. I purchased the pants during a sale, but regular pricing seems reasonable based on comparison shopping.