TyvekÆ 3/4" Covid-19 Screening Wristbands are made from durable DuPontTM TyvekÆ. These wristbands feature not only a unique design but an adhesive closure that can't be unattached without destroying the band. Also, each band is consecutively numbered for extra security. The backside of every wristband is white and the front is the design of your choice. Pre-printed. MUST be order in packs of 500. FEATURES: Made with durable, 100% DuPontTM TyvekÆ. Secure and tamper-evident closure. Sequentially numbered for accountability. Waterproof and tear-resistant. Ideal for short-term use: 1-2 days. Custom imprinting, barcoding and custom numbering available. Make Safety Visible with Covid-19 TyvekÆ Screening Wristbands.