crafting a backpack. a close-up look at the process and materials. blue fabric rip stop

backpack crafting process materials sewing design handmade diy tutorial leather canvas fabric thread zipper buckle strap adjustable sturdy durable functional versatile pockets compartments interior exterior hardware tools grommets rivets snaps stitching reinforced construction pattern template cutting measuring marking tracing assembly finishing waterproof weatherresistant color options size carrying storage travel adventure backpack close-up look materials blue rip stop