What are jammers?
Jammers are knee-length swim shorts that provide more coverage than trunks but have more freedom of movement due to their stretchy material. They closely resemble lycra cycling shorts and are popular amongst competitive swimmers for both training and racing. Usually made of nylon and lycra, or spandex material, their form-fitting design helps to reduce drag within the water. They often have some level of built-in compression, helping to support blood circulation and reduce muscle fatigue. If you want the competitive edge, FINA-approved jammers are available, which are made specifically for racing.