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
Know your hair type and be realistic about what hair styles work best with it. Don't agree to a new hair style that you know in your heart will be impossible to duplicate at home.