3 things to look for when buying a bicycle helmet
When choosing a bicycle helmet you mainly want to look at three things. Price, fit and keeping cool. Okay, and a forth thing, looking cool.
Fitting a bicycle helmet
You will want to fit the helmet correctly because it will provide far better protection and it will feel more comfortable. A properly fitted bicycle helmet will reach about halfway down your forehead and will cover a good part of the back of your head. The more it covers the better.
The strap should fit closely under the chin and bike clothesform a v-shape around the ears. Not all bicycle helmets are born the same and some will fit better than others. After you have tried one and tightened it make sure it does not wobble.
Lighter colours can be seen by other road users so go for brighter colours (one of the ones I have recommended below even has lights behind the straps). You should aim to buy a helmet with a rounded outer shell so there is nowhere for the helmet to get caught in a fall.
In terms of keeping cool as you would expect more air vents equal more cooling of the head. However, more air vents also means that there is less of the padding to protect your head. You should pick a trade-off between the two.