power ranger costumes are various because of the different series of power ranger tv shows. and most of their costumes are made from lycra and spandex fabric that is durable, breathable and flexible, so they can do most of the things in the costumes.
and Zyuranger power ranger costumes is the most popular sets recently. they are diamond patterns. and the costumes are mainly made from lycra and spandex, even including the helmets, this is the part that different from the power ranger costumes in TV show, but they are very cheap then. almost everyone can just afford one.
so this is a really good choice for some cosplayers, they don't have to pay a lot to get one, and at the same time, they can just get the joy of being a power ranger, the people that they admire.