G-Form has unveiled its first protective cases for the iPhone 4 and iPhone 4S. Dubbed the X Protect and Extreme Grid, both cases feature a rigid exterior shell and an inner core of the company’s signature RPT material — a composite made from Poron XRD and other proprietary materials — to provide impressive impact protection in a relatively thin package, as well as push-through coverage for the volume and sleep/wake buttons, as well as open access to all other ports and controls. Both cases come in black and yellow and are available for pre-order now for $40 with shipments expected to begin in February.