Ultra-thin can be easily put into bag and wherever you go. Made out of flexible PVC with a reinforced It's lightweight and won'for t break. fresnel Lenses designed for people with low for seniors, hobbyists and professionals. Great for full page magnifier visual fresnel lens solar projects, starter survival tools, and other daily house chores. The sheet is for ideal for reading small print on maps, instructions or books and has the ability to magnify full pages.