“Skin” is the industry term for a solid-surface polyurethane or silicone base material. There are different thicknesses of skin material, but at its lightest, it’s about as thick as a contact lens. It covers the natural scalp to create a faux scalp with hair growing out of it. It is gas permeable, but does not allow air, water or sweat to pass through.

Soft bond

Bonding a hair system with water- or solvent-based adhesives.

Stock hair system

A hair system that is pre-made, by hand, to general specifications, stored in a warehouse facility, and ready to ship upon ordering. It is not a custom product, but can sometimes by customized to better suit the customer.