Plastic Wristbands - Medium 3/4 Inch Solid Durable Vibrant Highly Visible Color Waterproof with Locking Snap - Kelly Green Color - 500 Pieces of Wristbands per Box Width 3/4" Made of tri-laminate material so it's waterproof, strong, and more durable than Tyvek wristbands. One size fits all. Locking, single-use snap prevents transfer. Vibrant, solid colors are highly visible.