HANS device subclass of protective gear in sports
A HANS device (head and neck support device) is a type of head restraint, a safety device in motorsports. Head restraints are mandatory when competing with most major motorsports sanctioning bodies.  They reduce the likelihood of head or neck injuries, including the often fatal basilar skull fracture, in the event of a crash. There are many such devices on the market today, but the HANS is the original and the most common.
is a type of is a kind of is a subtype of belongs to category is classified as