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
If you lie on your back while you sleep this could cause hair stress leading to split ends in the back. To avoid hair stress tie hair back using a soft scrunchie band.