Astronomers are often highly concerned with keeping their telescope optics clean. Since dust is all around us, it is almost impossible to keep it from accumulating on a telescope's optics entirely. However, there is a way to prevent dust from settling on your optics during an observing hiatus. AstroZap dust covers are proudly made in the USA using a material made from a mix of cotton and nylon. An elastic strap is stitched into this dust cover, allowing it to fit comfortably over the open end of Newtonian telescopes. The primary and secondary mirrors thus avoid gathering an excessive amount of dust, enabling sharper images.