Jammers, men's sports swimwear, are long-legged up to the middle of the thighs or just above the knees. Jammers should fit tightly around the swimmer's body to reduce water resistance during swimming training or competitions. Jammers are so tight that racers dress in them for a few minutes. The swimsuit is made of quality materials that resist tearing, the effects of chlorine and sunlight. Try quality jammers from swimming brands that pay attention to high standards.