These type of shoe is unusual in the sense that it looks more like gloves that encapsulate every toe than like traditional shoes.
Because of this, Vibram shoes give you this feeling of barefoot walking whilst protecting your feet at the same time.
Therefor you can enjoy all the health benefits of walking barefoot, without having to fear injuries.
They are especially good for sport enthusiasts as they provide a good grip with their sole and due to their flexible construction.
Vibrams are available in different models, each one especially designed for a certain task or sport, like rock climbing for example. In average they sell for under $100 which doesn't make them cheap, but still affordable.