Protection against Thermonuclear radiation.
The Telegizmo covers are lightweight and longer lasting than any telescope cover on the market today. (The TGD1 weighs 9 oz). Not just a plastic bag, but multiplayer insulator. The heat reflective performance of the cover is like Mylar but with a material strength equal to a multi-layer light weight tarp. The material was originally developed for NASA as an insulator in spacecraft. It is very strong, light, tear and puncture resistant and is highly superior to Mylar in durability. Most Telegizmo covers open on the end. However the refractor covers open on the side. All have a sown in drawstrap to close the open end.
