These wristbands are made of 3 lightweight layers of plastic, fused together, with a male/female snap and adjustable holes to fit various wrist sizes. 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 Holographic L-Shape Trilamainate wristbands are available in a wide range of colors. Custom printing and consecutive numbering are available at an extra charge.