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
To create retro-look hair waves liberally apply a good setting gel, then use massive clips to hold hair in desired shape. Use gentle hairdryer heat, release clips and enjoy lots of new waves.