Simply the lightest and graceful solution to protect your Iphone 4. Two air thin screen guard protect the front screen and back of your Iphone 4 without adding any weight or anything extra on your Iphone 4. Why would you want to ruin the elegance of your Apple Iphone 4 by putting on bulky tacky cases? You wouldn?t, you want to protect your Iphone while maintaining its original grace without adding on more weight or size. If you got one of those free bumpers from Apple, this is the only compatible solution to go with your bumper. Protect where the bumper cannot without adding anymore weight. The protective film after UV treatment to prevent ultraviolet light damage to the LCD screen.