A helmet is a protective gear used to protect the head from injuries. They are mostly used in sports where the chances of head injuries are high. Such sports include horse-racing, American football, baseball and ice hockey. Other than in sports, helmets are also worn by people working in risky and dangerous environs such mines, construction sites, firemen and heavy duty manufacturing industries.

Road safety regulations call for people using open vehicles such as motorcycles and scooters to put on helmets. These types of helmets are known as crash helmets.

About Motorcross
Motorcross is a type of motorcycle sport held on a rough terrain. It is held on enclosed off-road circuits. The name is actually derived from the words motor and cross-country. The sport is characterized by high speeds, rough terrain and dangerous stunts. Due to the high probability of accidents, riders are required to put on motorcross helmets, in addition to other safety clothing.

Helmet Construction
A motorcross helmet is made of resin or plastic strengthened with strong fibers. It is made to resemble a typical round hat. It has a rigid outer shell and impact-absorbing liner that protects the head by dispersing energy and absorbing impact. The outer shell is made of thermoplastics that compress when they hit anything hard.

The absorbent liner is made of polystyrene which is a shock absorber. There is a face shield that protects the eyes, nose and mouth from flying debris such as dust, rain and insects. It also permits good vision. There is also a retention system at the nape of the neck that fastens the helmet to the head to prevent it from falling off. It is basically a chin strap connected to each side of the helmet head. There is also a comfort padding that is the part in direct contact with your head. It is made of soft foam and cloth layer.

Motorcross helmets generally protect the brain, face and life in case of any injury. They also prevent wind noise due to the high speed of the sport. They also deflect bugs and wind hitting at your eyes and mouth. A motorcross helmet even protects the rider from severe weather conditions and fatigue.

Things to Consider When Choosing an Helmet
Finally, when choosing a helmet, one should go for a brand that is proven to be more reliable in terms of penetration, impact, retention and peripheral vision. Penetration is the ability to withstand a blow from a hard object, retention is the chin strap's ability to be fastened without breaking, impact is the shock-absorbing capacity of the helmet and peripheral vision means the helmet must provide minimum side vision of 105 degrees.