Two Swedish students have invented a new bicycle helmet. It's invisible because you cannot see it. The "invisible" helmet is really a kind of airbag inside a collar. People wear it around their neck like a scarf. When the cyclist falls off his/her bike, the collar fills with gas and an airbag goes around the head. The students, Anna Haupt and Terese Alstin, want to change how people cycle. They think normal helmets are too big and heavy. They said it is "like a hard mushroom(蘑菇)on your head". They called their helmet the Hövding. They said it is great, so "people would be happy to wear it".
They started research on the Hövding in 2005. They looked at thousands of cycling accidents. They wanted to make the safest helmet and change how people cycle. They teamed up with a Swedish airbag company. Today, their company employs 17 people. Haupt and Alstin said: "Cars are so yesterday. Bikes are the future." They also said their helmet would bring them lots of money. People can only buy the helmet online in Europe, for around $530. The company did not say when people in the rest of the world could buy it.
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