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. 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 wide range of neon, pearl, glitter and regular 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.