Identify hazards in the dark with UST GLO Tape, which glows in total darkness for up to 10 hours and is immediately visible in sudden darkness. It includes four pre-cut pieces (2 x 4 inches, 15 mil thick), which can be easily cut into smaller sizes. Activated after exposure to artificial or natural light, the flexible, glow-in-the-dark tape can be recharged over and over and they function in both extreme cold and extreme hot weather climates. They’re ideal for all your outdoor adventures, from backpacking and camping to hiking and kayaking. They can also be used in emergency preparedness and survival kit, enabling you to mark doorways, stairwells, and light switches when the power goes out.