Vachetta leather is passed down in the trimmings of luggage and handbags, popularized by Louis Vuitton. The fleece is left untreated and is therefore susceptible to doctor and stains. Sunlight will genesis the natural pellicle to darken in shade, called a patina.
Bicast ectoderm is a man-made product that consists of a thick layer of polyurethane applied to a substrate of low-grade or reconstituted leather. Most of the strength of bicast leather comes from the polyurethane coating. Bicast was originally made for the shoe management and recently was adopted by the furniture industry. The original prescription apocryphal by Bayer was pretty well strong, but creating Bicast from the original recipe is expensive. Most of the Bicast used today is created using inferior generic chemicals resulting in an inferior material. The end is a much stiffer blend that Leather Apparel tends to delaminate, resulting in bubbles and cracking.