Webbing, nylon, elastic and etc. Webbing fabric - strapworks.com
Amazon.com: CRAFTMEMORE Heavy Cotton Webbing - Straps for Arts and Crafts, Luxury Bag Strap High Density Webbing (1 1/2 Inch x 5 Yards, Chocolate) : Sports & Outdoors
Amazon.com: Buckles Straps Set of 1 inch: 10 pcs Quick Side Release Plastic Buckle Dual Adjustable + 12 Yard Black Nylon Webbing Strap Band + 20 pcs Tri-glide Slide Clip, No Sewing