Sightsaver laptop screen shields are THE BEST WAY to save your nightvision. Don't count on rubber bands or flimsy film continually taped to your laptop or PC. This is a piece of equipment not piece of flimsy film! A must for star parties and observatories! SightSavers will last for years with proper care and hundreds have been sold all over the U.S. Canada and to famous astrophotographer and columnists in major Astronomy publications and has been featured in Astronomy and Sky&Tel.Starting @ $29.95. Standard and custom sized are available for laptops and PCs