a plastic shell equipped with an adjustable suspension system and a chinstrap. designed to disperse the energy of an object falling on the head. Some helmets may be designed to take side. front. and back impacts (contrast with hard hat).
climbing helmet (Wikipedia)
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Rock-climbing equipment requires a range of specialized sports equipment, for training, for aid climbing (i.e. to assist in ascending by artificial means), and for free climbing (where protection equipment is needed against the consequences of a fall). Developments in rock-climbing equipment played an important role in the history of rock climbing, enabling climbers to ascend more difficult climbing routes safely, and materially improving the strength, conditioning, and ability of climbers.