Bike helmets are designed to help protect your head in the event of you coming off in an accident.
A cycling helmet has many features integrated into it to help reduce the potential damage caused, with many manufacturers starting to make use of MIPS Technology. Different cyclists also want different styles of helmets with racing bike helmets being much more aerodynamic than mountain bike helmets which tend to have more protection to the rear. Full face helmets are used by downhill and BMX riders and offer the ultimate protection available.
Not sure what type of helmet you require? Have a read of our Helmet Buying Guide