Generally if the back within the canvas isn't finished properly and looks rough this is far better to avoid using such cloth.
This also results from a weakness ultimately garments, causing it drop its shape or even fray and turned into holey. https://pr.newsmax.com/article/Garage-Door-Grunts-Expands-as-Premier-Commercial-Garage-Door-Opener-Installers?storyId=668ea40cf31e8e0008dc8f9c