Duo-Tac maximum wear (2-3 weeks) tape is designed for universal use on all types of hair systems. Not only is it optimized for poly systems, but for mesh systems as well. Along with a low residue and easy cleanup, it is a great option for users. Keep the product away from heat, humidity, and light. Store in a well-ventilated, cool, dark, dry, room-temperature controlled environment (60-80°F). Seal bags completely. With proper storage, our tapes have a shelf life of up to one year.