Need help giving CPR using the handy PocketCPR app? iSkin had got your covered with their new Pulse silicone case for the iphone 3G/S. The Pulse is a hybrid two-layer silicone case that lets you slip your hand into one layer of the case so that you can do more with your hand while having your iPhone on top. The Pulse is also designed for exercisers who use apps to help them keep track. With all this, the Pulse gives your iPhone great scratch, shock and impact protection. You might want to have a look at this case by clicking the source link below. The Pulse case is now available for $29.99, in five colors.