Racing helmet:

It mainly refers to the helmet used in automobile racing. For example, F1 racing, F1 driver's helmet is composed of carbon, Kevlar fiber, polyethylene three materials. Helmets used in F1 must, of course, pass the FIA's "crash and fire performance tests". Compared with other racing helmets, when the car is running at 330 km/h on the track, the air turbulence flowing through the helmet will not only cause a great burden on the driver's neck (the helmet drifts upward), but also reduce the effect of engine intake. So the helmets used by F1 drivers have also been designed by aerodynamic engineers (you can see a lot of spoilers on the surface) and even become part of the development program for new cars.

The helmet is equipped with a radio supply device (for the driver to communicate with the team manager and technicians), and a drinking tube for the driver to replenish the water during the race. Fans unfamiliar with racing may not be aware of the physical load on F1 drivers. This is not just a simple task that can be done by turning the steering wheel. The driver's heart beats more than 200 times per minute throughout the race, and the driver loses 3 to 4 kilograms (lost water) at the end of the race. So, the first thing drivers do after the race is to rehydrate. Imagine working out in the heat of the afternoon, wearing a tight, unventilated fireproof racing suit, and earning millions of pounds a year is not that easy. In order to reduce the temperature inside the helmet during the game, the ventilation duct inside the helmet is also carefully designed to optimize its function of taking away the heat inside the helmet.

The surface of the helmet goggles is covered with multiple layers of plastic film (called the Visor), each piece is about 0.3 mm thick. During the race, there is often dust, oil and dirt on the helmet, and the driver will tear off a layer of Visor after a period of time to ensure a clear vision. Since 2002, the FIA has mandated that the helmet must be integrated with the neck support device HANS. HANS has been a must-have protection tool for drivers in North American racing for many years.

Bicycle helmets can be divided into: downhill helmets, ordinary riding helmets

Riding helmet:

Horse riding can be divided into: equestrian helmet, knight helmet, racing helmet

Other sports helmets can be divided into: skateboard helmet, mountaineering helmet, roller skating helmet (downhill helmet, stunt helmet), ice hockey helmet, baseball helmet, speed skating helmet, skating helmet, skating helmet, hockey helmet, football helmet, roller skating helmet, street dance helmet, extreme sports helmet

Hockey helmet:

All players must wear hockey helmets, and referees and sideline officials may also wear helmets. For competitions of 20 years of age or under approved by the International Ice Federation, the player must wear a fully protected mask, which shall be constructed to block the passage of the puck or the blade of the puck stick.

Roller skating helmet:

1.EPS(polyacrylic) helmet, the inside of the helmet is polyacrylic, and the outside is a plastic shell.

2.ABS(engineering plastic) hard plastic shell plus EPS(polypropylene) lining, mostly used in extreme roller skating and FSK and other projects. Mainly used to prevent collision with hard objects, to protect the head.

3.ABS(Engineering plastic) hard plastic shell with hard sponge lining, mostly used in ice hockey and inline skating and other projects. It is mainly used to prevent collision with hard objects and protect the head from the impact of the ice ball. Many helmets can be fitted with plexiglass or wire welded mesh.

4. The helmet with lower palate protection is basically a glass fiber or carbon fiber shell with EPS lining, some varieties are made of pure EPS, and the part of the lower palate protection can be removed. These helmets are used in roller skating downhill.

5. aerodynamic helmets are essentially made of fiberglass or carbon fiber cladding with a smooth surface, some with EPS lining. The shape is very unique, the front is a large goggles, the half of the face is covered, the back half of the helmet is very long, and the part that connects the neck with the back is rectified when sliding, reducing the air resistance, so it is called the aerodynamic helmet.

Football helmet:

Americans love the game of football, and spectators are thrilled to see players in full protective gear running, falling, and scoring touchdowns. However, this kind of intense exercise brings excitement and stimulation to the audience, but also brings serious injuries to the athletes, especially to the head. So football must wear special helmets.

Ski helmet:

Ski helmet is made of hard plastic molding or glass steel shell, helmet with impact resistant EPS inner shell and special, supporting, comfortable and elastic lining insulation layer, the whole helmet is streamlined, relatively light, does not affect the field of vision, skiers wear a sense of security. Helmets are generally divided into full helmets and half helmets, half helmets are suitable for wearing when doing skills, easy to hear various sounds from the outside world and have a heat dissipation function; Full helmets are suitable for speed races. Ski helmets are often used in downhill and super-G skiing, ski jumping, aerials and other events.