Tyvek Wristbands 3/4 Inch - Happy Faces Pattern - Blue Color - 500 Bands Per Box Width:	3/4" w Happy Faces Expressions wristbands feature fun, colorful pre-printed designs that your guests will love!. Made of DuPont Tyvek which is economical, water-resistant, and comfortable. One size fits all. Strong adhesive closure with tamper-resistant feature that shreds if tampered with. Wristbands are serial numbered.