200 3/4" Black Tyvek Wristbands for all your event needs. These wristbands have a security die-cut adhesive application to prevent the sharing of wristbands with others. These are 100 % waterproof and you can write on them with a sharpie. Ideal for all your event needs including : Carnivals, Concerts, Group outings, school functions and so much more. I ship within 1 business day, thanks for looking!!!