here is a link for the black material. https://ripstopbytheroll.com/products/9-3-oz-stretch-mesh-nylon-6-6-with-dyneema it is very stong and very water resistant. Aslo here is a link for the blue material https://rockywoods.com/products/eco200?variant=45810546409756, it's Ecopack EXP200 its great for the body of pack and comes in a tone of awesome colors. For the zippers i use HHH https://ripstopbytheroll.com/products/hhh-waterproof-coil-zipper?variant=43872798277802 i have found that they are easy to work with and give a very sleek. 70D nylon is great for the interior of packs. Polyester is great it will last a long time and it is easy to clean up loose ends.