Speedo swimwear shown in the above image is made of quick drying material that fits snugly to your waist and is similar in shape/ size to regular briefs. This type of swimwear is often worn by competitive athletes and recreational lap swimmers. Similarly, you may find the same material and tight fit in a knee length version, known as a jammer.
The benefits of wearing a brief style swimsuit (aka speedo) are they allow for full range of motion when swimming, dry quickly and allow you to get a great tan! They also are easy to travel with as they don’t weigh much and don’t take up much space in your luggage. The style shown above is a perfect example of the same.