A helmet is simply a form of protection worn on the head to protect it. More specifically, a full-face helmet protects the entire skull, without any other coverings underneath. Symbolic or ceremonial helmets without further protective function can be worn by soldiers. Typically, though, military helmets are made of Kevlar or similar lightweight synthetic fibers.
A helmet, unlike the visor found on automobiles and motorcycles, does not have a visor attached to the top. Helmets have an inner liner that helps to keep dirt, dust, and debris from entering the inside of the helmet, while at the same time reducing the internal pressure within the helmet. On the flip side, if a helmet was to lose pressure while in use, the liner would rupture, allowing some cleaning solution to seep into the inside. The result would be a cloudy or murky looking helmet. Helmets are generally made of hard polycarbonate or acrylic shells with a hard plastic or composite coating. It is also give the best standard safety certifications.
Some regulations govern the sale and use of full-face helmets in certain sports. In the United States, all participating athletes in the National Football League must wear a full face helmet. Many bike and motorcycle enthusiasts, however, prefer to purchase a DOT approved half helmet that covers only the top half of the head. This half helmet is often made of a hard material, such as polycarbonate or carbon fiber, which prevents it from cracking during vigorous exercise. In many cases, these half helmets are also available in non-flammable and open faced varieties.
A helmet’s primary protection mechanism is the outer shell. The outer shell serves as the “joint” between the helmet and the wearer’s skull. When a motorcycle helmet is damaged, it must be replaced. Often, this is the only method for saving a rider’s life when sustaining an accident. However, not all damages to the face shield require a replacement, and it is important to keep in mind that each individual case has its own unique circumstances and potential risks.
Some helmet manufacturers, such as ScorpionExo, have taken steps to make the inner portion of their modular helmets more ergonomic, such as replacing the traditional chin bar with a removable one. Chin bars were originally placed below the eyebrows in order to help maintain stability during high-speed riding. Today’s chin bars have been adapted to fit comfortably over the cheeks, keeping the wearer’s cheeks in constant contact with the smooth, rounded outer surface of the helmet. Removal of the chin bar allows riders to avoid having the traditional visor, which can get caught on things during an accident.
Helmets have proven to be extremely useful in many different situations, preventing the serious injury and even death that might occur if the rider was not wearing a helmet. Helmets are made of a variety of lightweight materials, including polycarbonate, carbon fiber, and Kevlar, and they can be custom designed and colored in any color or material that the manufacturer chooses. Many helmets today meet or exceed Department of Transportation (DOT) standard tests for impact resistance, collision protection, and energy efficiency. In addition, studies have shown that a DOT-compliant helmet can reduce the incidence of head injuries in motorcycle accidents by up to eighty percent compared to non-compliant helmets.