The leather I tested on was probably ~4oz oil-tanned pullup leather. The second test was 4 layers totaling about 8mm of thickness. The leather is moderately supple.

Hand-sewn leather, chamois, and synthetic suede on the A-pillars, map pockets, dashtop, sun visors, headliner, and center console. Door panels awash in gelatinous rolls and pleats of cowskin ...