Mister Fantastic can shift his body (or portions of same) into a super-malleable state, enabling him to stretch, compress, expand, deform, elongate, contract or otherwise reshape his physical form at will. He can stretch his limbs, neck and torso to incredible lengths, though extending himself beyond approximately 1500 feet is a serious physical strain. When assuming non-humanoid shapes, he tends to favor simple constructs such as barricades, canopies, cylinders, cubes, nets, parachutes and spheres, generally assuming a volume of no greater than 1.7 cubic feet (though he can expand far beyond that volume if the shape he forms is thin-shelled and hollow). He can render himself paper-thin, or become slim enough in diameter to thread the eye of a needle. His malleable form renders him relatively immune to most conventional impacts; for instance, bullets fired into his body tend to bounce back at the shooter, and he can bodily contain small explosions. It is almost impossible to lacerate or puncture his skin unless he consciously allows such penetrations. By reshaping his features, Reed can disguise himself at will.