Are there sites to explain Shoe Assembly; techniques/cost and materials/cost
i.e. Welding (HF Weld), PU Injection, Stitching techniques, etc…
I’ve been looking through various shoe sites and shoe catalogs; they explain diferrent terms…
e.g. Ecsaine Upper, Split sole, One piece sole, 3d lasting, Shine up to control odor, or Natural Split suede