Most cases protect the sides and backs of your iPhone 4/4S, but they usually leave the screen open and vulnerable. The Aegis for iPhone 4/4S from TopKase has a shutter that slides over the screen when you aren’t using the phone. The case and the shutter are made of anodized aluminum, with eight internal shock-absorbing silicone pads and a microfiber lining on the back of the sliding shutter to clean your screen. The case adds only 1.3 ounces to the weight of the iPhone, and it measures 4.72″ x 2.59″ x 0.59″. Although not all colors are in stock at the moment, available case colors are Silver, Jet Black, Baby Pink, Cherry Pink, Ruby Red, Electric Blue, Royal Purple with either silver or black accents on the sliders. The Aegis sells for $59.95.