What is the Dutch company who specializes in sports, clothing, and is known for developing the Shock Stop system classified as?
Shock stop Shock Stop is a system developed by sports equipment manufacturer Head to damp (reduce) vibration in its range of titanium tennis rackets. It works by drawing the vibration down the frame of the racket into the handle, where a ball-bearing balanced mechanism absorbs the shock.
Birkenstock Birkenstock Orthopädie GmbH & Co. KG is a shoe manufacturer headquartered in Neustadt (Wied), Germany. The company sells Birkenstock, a German brand of sandals and other shoes notable for their contoured cork and rubber footbeds, which conform somewhat to the shape of their wearers' feet. Representative products include the two-strap Arizona sandal and the Boston clog.