Precision Dynamics, Identification Band, Box Of 500Product Description Pdcs sentry superband alert bands are constructed of lightweight non stretch polyester with a patented secursnap closure for maximum security Extra large text provides clarification to clinicians (assisting in dim light conditions or for those who are color blind) Only primary and secondary colors used as indicators Secursnap closure prevents transfer of wristbands All provide maximum security and comfort. custom logos and cues can