Gassets
Gassets are triangular or diamond-shaped pieces of fabric inserted into a garment to provide extra fullness or to shape the garment. They are commonly found in clothing that requires a greater range of motion in the arms or legs, such as in the underarm of a shirt or jacket, or in the crotch of trousers or leggings. The addition of a gusset allows for a more comfortable fit and prevents the fabric from pulling or tearing in areas of high stress.
Historically, gussets have been used for centuries in various forms of clothing, from ancient tunics to modern