The inner side of the headband are soft sponge The headband adjusting wheel can adjust the appropriate size ( pull to adjust, press to) Perfectly for various sizes of heads The headband magnifiers are suitable for for hobbies,, model building, reading, inspection, soldering, jewelry making and other tasks 5 LED headlights can adjust the direction to obtain a more angle Do not place the glass in the direct sunlight to avoid Do not use the glass to observe the sun so as not to burn your eyes Please use a soft cloth or lens cleaning paper to clean the lens The magnifier are shatterproof clear acrylic lens design, high definition and lightweight It will not make the heads feel heavy.4 magnifications to meet your different needs: 1.5X 3X 9.5X 11X, Manufacturer: Tsophreniq