Period swimwear works by using a three-layer system to absorb menstrual blood and prevent leaks. The first layer is a moisture-wicking fabric that pulls moisture away from the skin. This helps to keep the skin dry and comfortable, and also helps to prevent bacteria from growing. The second layer is an absorbent gusset that absorbs menstrual blood. This layer is typically made of a super absorbent material, such as bamboo fibers or micro modal. The third layer is a waterproof outer layer that prevents water from getting to the absorbent layer. This layer is typically made of a material such as nylon or polyester.

Here is a more detailed explanation of how each layer works:

• Moisture-wicking fabric: The moisture-wicking fabric is the outermost layer of period swimwear. It is made of a material that pulls moisture away from the skin and helps to keep it dry. This is important for preventing chafing and irritation, as well as for preventing the growth of bacteria.
• Absorbent gusset: The absorbent gusset is the middle layer of period swimwear. It is made of a super absorbent material that absorbs menstrual blood. This layer is typically made of bamboo fibers or micro modal. Bamboo fibers are naturally antibacterial and moisture-wicking, making them a good choice for period swimwear. Micro modal is a synthetic fiber that is also very absorbent and soft.
• Waterproof outer layer: The waterproof outer layer is the innermost layer of period swimwear. It prevents water from getting to the absorbent layer. This layer is typically made of a material such as nylon or polyester. Nylon and polyester are both water-resistant and durable materials that are well-suited for swimwear.

Period swimwear typically holds up to 2-3 teaspoons of menstrual blood, which is equivalent to 1-2 tampons. This is enough to protect most people on light to moderate flow days. If you have a heavy flow, you may want to wear a backup product, such as a tampon or menstrual cup.

Period swimwear is a great option for people who want to be able to swim and enjoy water activities without having to worry about leaks or discomfort. It is also a good option for people who have irregular periods or who are just starting their periods.

Here are some additional tips for using period swimwear:

• Wash period swimwear in cold water with mild detergent.
• Air dry period swimwear.
• Do not bleach period swimwear.
• Replace period swimwear after 12-18 months of use.