Shock Doctor Titan Alloy Flex Cup The Titan Alloy Flex Cup is the breakthrough that nothing can break through. A multi-layer protection device designed to shield and transfer shock away from areas where protection is most crucial, this lightweight, bio-shape cup forms a steel shield that will fit comfortably to an athletic frame. Constructed of stainless steel alloy for unparalleled protection Bio-shape design for maximum comfort and range of motion Gel perimeter pad for maximum comfort