Bivvy / Zip markers allow tent and bag zips to be seen, located and operated by the occupants in darkness, enabling immediate exit without using electric torches or chemical light sources. Simple, reliable and very effective, operational efficiency and safety are enhanced in darkness.
These zip pull markers will remain continuously illuminated for more than 10 years, even during long periods of complete darkness.
No battery, switch, recharging or spare parts are required.
Light is provided by GTLS (Gaseous Tritium Light Source) which provides a safe, stable, reliable self powered source of light, suitable for operation between -40 deg C to 70 deg C, they will continue to work normally even when immersed and used in water.

•Ideal on ops or exercise.
•Can be submersed underwater to a depth of 30m.
•Designed to glow for 10 years