to protect their faces
protection
Knights typically did not wear crowns, as crowns were symbols of royalty and nobility reserved for kings and queens. Instead, knights wore helmets as part of their armor, which provided protection in battle. They might have worn decorative headpieces or crests on their helmets to signify their allegiance or rank, but these were not crowns in the traditional sense. Crowns were primarily associated with sovereign authority rather than the chivalric status of knights.
The NHL mandated the use of helmets for players starting in the 1979-1980 season.
There's the Great helm of Albert von Pranckh, 14th century that shows the helmet style often used by knights of the Teutonic Order. There is a link to an image below. There's also the Codex Manesse depicting Tanhauser in the habit of the Teutonic Order along with a great helm topped with horned wings. They would've worn horned helmets, or several different variations of the great helms with or without horned or any other types of ornamentation throughout the 13th and 14th century. There's also tournament heraldry of knights with horns, animals, fans depicting heraldry and a whole assortment of items on their great helms in order to distinguish themselves from other knights on tournaments and battlefields.
When the knights rode their horses and charged at each other they would yell "shut up" and that meant to shut their helmets.
Same reason as helmets have always been, and are used - to protect their heads against impact.
They mainly use the helmets to hide their identities. They want a private life despite their fame.
There are steel helmets with fiberglass liners, and Kevlar ones. Steel helmets are made from sheet steel, fiberglass cloth and polyester resin. Kevlar helmets are made from Kevlar cloth and epoxy resin.
The Knights Templar's armor typically consisted of a combination of chainmail and plate armor for protection. They wore a surcoat over their armor, often featuring the distinctive red cross on a white background that symbolized their order. In addition to helmets, gauntlets, and greaves for limb protection, their armor was designed to balance mobility with defense during battles and crusades. The use of heraldic symbols helped to identify individual knights on the battlefield.
no
buffalo
They use lights on the top of their helmets and digging tools.