Arm bands serve a variety of purposes. In many cultures, they are worn as ornamental jewelry. While modern practices have made these arm bands popular in all types of material, the original one's were made of precious metal.
Modern use of the arm band includes athletic wear and fashion wear, comfort wear etc. Sometimes, arm bands are also worn in order to hold other accessories.
Traditionally, only gold, silver and other such metals were used for arm bands. Now, cloth and other material are being used for arm bands.
These have made arm bands serve a wide variety of purposes across the spectrum. They are used for both utilitarian and aesthetic values. For aesthetic value, though, the use of gold and silver has waned. 
Owing to their use for several centuries and because they are so heavy, the popularity of the use of precious metals in making arm bands has declined. It has declined considerably. Plastic is also a safe metal. It's easy to make jewelry from this metal. Plastic when used to make arm bands, lends a whole new paradigm to these arm bands. They can be made in flamboyant styles with very simple designs.
These have the fashion followers bowled over. The touch of elegance that Plastic brings is unmatched. Added to this, they are extremely light, since Plastic is a light metal. Unlike gold and silver, Plastic is comfortable to wear and is even safe.They are very different from the older metals and offer supreme elegance by virtue of being light, simple and unique.
The arm bands made from Plastic can be easily designed into several exquisite varieties. The making is cheap since the cost involves only the labor, one can easily own several armbands of this kind. This adds variety to the collection of jewelry at no extra cost.
