- Lociban Identification Wristbands WD-CY21, pack of 400 units in 4 different colors - Waterproof synthetic paper, tear-resistant and wear-resistant, does not fade or tear easily - Secure self-adhesive closure and anti-counterfeiting system for added protection - Adjustable to different wrist sizes, suitable for adults and children (25 x 2 cm) - Lightweight, comfortable, and easy to carry, ideal for prolonged use - Perfect for identifying guests at concerts, parties, festivals, playgrounds, fairs, and events - Facilitate access control and security in all types of activities - Do not cause discomfort or skin damage, suitable for daily use and replacement