This 25mm wrist band is made of 3 layers of PVC vinyl and one of most popular ID wrist band, it features tamperproof, snap closure, and stretch resistant, vinyl wristbands are waterproof and can be worn for very long periods of time. The backside of the vinyl wristband is white, not the color or design on the front. It is designed for multi-days events and activities, also a great ID band for hospital usage. 21 standard colours are available.