This item is used as rings for you to do exercises outdoors. It is made of silicone material which is waterproof so that you can even wear it when you swim or dive. It is very flexible so you don't need to worry that it will cause any uncomfortable or make your finger swell. Features - Color: Black. - Material: Silicone. - Size: About 7.22x2.3x0.87cm/2.84x0.91x0.34inch. - It is a replacement of rings when you need to do exercises outside. - Made of silicone material which is waterproof so that you can even wear it when you swim or dive. - Very flexible so you don't need to worry that it will cause any uncomfortable or make your finger swell. - Great for any work or activities in order to avoid to wear your valuable wedding band. - material give you more comforatble wearing experience.