Usually, the shell of the helmet is made of high-strength materials, such as metal, engineering plastics, Kevlar fiber, etc., through its deformation to absorb most of the impact; the lining material has the ability to absorb sweat, keep warm, and absorb shock. Military helmets often have the functi

Cycling offers freedom, fitness, and fun—but only when you're properly protected. A bike helmet can reduce your risk of head injury by up to 85%, yet many riders either skip wearing one entirely or wear it incorrectly. The difference between a helmet that protects and one that fails often comes down to proper fit and positioning.

A bicycle helmet is the single most important piece of safety gear a cyclist can own. But its ability to protect you is almost entirely dependent on one critical factor: fit. A poorly fitting helmet is like a seatbelt that’s not buckled—it offers a false sense of security with drastically reduced effectiveness.

Every year, thousands of cyclists suffer head injuries that could have been prevented with a properly fitted bike helmet. The difference between a helmet that fits correctly and one that doesn't could be the difference between walking away from an accident and suffering a serious brain injury.