Friends told us about Invisible Shield a number of years ago. Ali has used the material to protect the screen of her 60CsX for a few years. It's a cut above most screen protectors and really durable. Ali likes it better than the product I was buying because it cuts glare when navigating. Usually a pre-cut Invisible Shield costs about $15 for one gps. I recently spotted a three pack of sheets at the local Target for about $18. If you don't mind cutting your own template for your gps, you can save 60% of the cost of each protector. For gps units with smaller screens like the ETrex and Vista Garmins or the Magellan GC, you can cut six shields from each three-pack. From two sheets of one three-pack, I was able to cut protectors for my Vista HcX, my Magellan GC and two digital cameras.