what is a gusseted crotch Hello. Welcome to solsarin. This post is about “what is a gusseted crotch“. Gusset In sewing, a gusset is a triangular or rhomboidal piece of fabric inserted into a seam to add breadth or reduce stress from tight-fitting clothing. Gussets were used at the shoulders, underarms, and hems of traditional shirts and chemises made of rectangular lengths of linen to shape the garments …