What are jammers in swimming?
Jammers resemble cycling shorts and are designed to reduce drag and increase hydrodynamics in the water. They also offer muscle support and improve streamline efficiency. Jammers extend from the waist to just above the knee, providing ample coverage and minimizing water resistance during swimming strokes. Jammers, it turns out, are tight lycra swimming trunks with legs, similar to cycling shorts. Much more aquadynamic than baggy shorts. F 53, now has a son with multiple styles of swimwear. Not sure if fact, or opinion, but my son said they were called jammers, because they jammed up your bum, being so tight fitting!