The zipper pouch made by nylon which is durable, ripstop, scratch-resistant, water repellent. There is a nice pull on the zipper to facilitate opening and closing the bags. 3 SETS AT VARIOUS SIZES: This travel package bag set includes 3 sizes packing pouches: Large- 14x2.4x9.8 inch; Medium-10x2x7.9 inch; Small-8.7x1.6x5.9 inch. The bottoms can be expanded, so it will pop out and give more room. The different sizes will really help you keep everything organized during travels. It has a clip on one side so you could easy clip to your backpack or other gear to take with you to travel. Large size for tablet or magazine; Medium size for perhaps cosmetics, underwear, but really it is up to you what to put in there.; Small size can be used as electronic cable organizer or makeup bag for daily routine.The small one is good for personal items because it has dividers in it. The small one has a nylon sleeve inside, along with two mesh pockets that are well stitched and this construction helps to store your items clean and separate by your purpose. 3 SETS AT VARIOUS SIZES: This travel package bag set includes 3 sizes packing pouches: Large- 14x2.4x9.8 inch; Medium-10x2x7.9 inch; Small-8.7x1.6x5.9 inch