ABS is defined as Acrylonitrile-Butadiene-Styrene which is blow molded plastic.
This is a specific type of plastic which is used in artificial nails for the actual tips. There are different options available, but some are designed to be more resistant to splits or cracks than others.
Daily Hair Tip
A good volumizing trick is to mix equal parts of hair mousse and gel together and then paint sparingly on the roots of your hair before blow drying with a make-up brush.