When you put on a suit that gives you a whole new kind of body (usually involving muscle growth). Like getting a big new muscle bod, but there's a zip up the back.
Related: Age Progression; Age Regression; Ass Growth; Belly Growth; Body Parts in Strange Places; Breast Expansion; Detachable; Foot Growth; Gender Swap; Getting Fatter; Getting Hairy; Getting Handsomer; Gradual Change; Hairless; Human to Animal/Anthro; Human to Body Part; Human to Inanimate; Inflation; Male Pregnancy; Race Transformation; Stretchy; Transformation.
Child of: Other Physical Changes.
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