Complex sentence: Couch primarily makes vegan guitar straps, belts, and wallets out of automotive and upholstery vinyls, including some vintage found or "deadstock" fabrics.
Split into simpler sentences: Couch primarily makes vegan guitar straps, belts, and wallets. It uses vegan, animal-products-free construction materials such as automotive and upholstery vinyls, including some vintage found or "deadstock" fabrics.