Welded seams undoubtedly are a step up from taped seams and might be commonly be found in high finish waterproof backpacks. As opposed to stitching the seam and taping them to produce a seal, the fabric is instead fused jointly with warmth to make a watertight bond. Polyester and nylon https://canvas-leather-backpack04824.bloginder.com/29359048/5-simple-techniques-for-ergonomic-backpack-design