They are made of 3 layers of vinyl, fused together, with a male/female snap and adjustable holes to fit various wrist sizes. The outer layer gives strong colors, the middle layer makes them tough and non–stretch, while the inner layer is a smooth soft vinyl for comfort on the skin. These bands are supplied with reusable snaps for easy removal and reuse. The snaps are plastic unless otherwise indicated. For safety reasons, the bands will break when strong force is applied, such that a person’s hand will not be damaged if the band ever accidentally hooks to anything. These L-Shape wristbands are available in a range of colors. Custom printing and consecutive numbering are available at an extra charge. Please allow up to 5 days production time for numbering or custom printing.