Alternative leather (bicast leather) is a fabric or finish intended to substitute for leather in fields such as upholstery, clothing, footwear and fabrics, and other uses where a leather-like finish is required but the actual material is cost-prohibitive, unsuitable, or unusable for ethical reasons. MuSkin, a new type of "vegan" leather, is being produced using skin of mushroom caps. The tanning process is non-toxic. The final product is softer and more breathable, and more water-repellent than ordinary leather. It is also biodegradable. Production of synthetic, artificial/faux "leathers" has recently evolved so that a shell coating layer goes on top of a synthetic polymer blend, so the definition of "synthetic", "artificial/faux" leather methods of production no longer necessarily requires composite leather blends of [coated] raw-tanned cowhide grains and/or its fibrous layers.

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