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Leakproof underwear is a game-changer for period management, but to keep it working effectively, you need to treat it a little differently than your regular underwear. The special absorbent layers and waterproof barriers can break down if exposed to fabric softeners, bleach, or high heat. With the right care routine, your leakproof underwear can stay absorbent and comfortable for years.

Whether you're new to period underwear or looking to extend the lifespan of your current collection, these simple washing and drying tips will help you preserve absorbency and avoid common mistakes. Let's walk through the best practices for keeping your leakproof underwear in top shape.

Why Special Care Matters for Leakproof Underwear

Leakproof underwear typically has multiple layers: a moisture-wicking top layer, an absorbent core, and a waterproof backing. Harsh detergents, fabric softeners, and bleach can clog the absorbent fibers or degrade the waterproof barrier. High heat from dryers or irons can melt or warp the materials, reducing effectiveness.

Most brands, including Knix, recommend avoiding fabric softeners and dryer sheets entirely. These products coat the fibers with a waxy residue that repels liquid, which is the opposite of what you want. Instead, use a mild, fragrance-free detergent and follow the care instructions on the label.

• Always check the care tag for specific instructions from the manufacturer.
• Avoid bleach, fabric softeners, and dryer sheets to keep absorbency intact.

How to Wash Leakproof Underwear: Step-by-Step

Rinse your leakproof underwear in cold water as soon as possible after wearing to remove excess blood. This prevents stains from setting and reduces odor. You can do this in the sink or while showering. After rinsing, you can either hand wash or machine wash.

For machine washing, place your leakproof underwear in a mesh laundry bag to protect the delicate layers. Use a gentle cycle with cold water and a small amount of mild detergent. Avoid washing with heavy items like jeans or towels that can cause friction. For hand washing, fill a basin with cold water, add a drop of mild detergent, and gently agitate the underwear. Rinse thoroughly until no soap remains.

• Machine wash on a gentle cycle with cold water in a mesh bag.
• Hand wash with cold water and mild detergent for extra care.
• Never wring or twist the underwear; gently squeeze out excess water.

Drying Leakproof Underwear: Air Dry Only

Heat is the biggest enemy of leakproof underwear. The waterproof layer can be damaged by high temperatures, so always air dry your period underwear. Hang them on a drying rack or lay them flat on a towel away from direct sunlight. Avoid using a clothes dryer, radiator, or iron.

Air drying may take a few hours, but it ensures the absorbent layers remain effective. If you're in a hurry, you can use a fan to speed up the process. Never use a hairdryer or place them on a hot surface. With proper drying, your leakproof underwear can maintain its absorbency for many cycles.

• Air dry your leakproof underwear on a rack or flat on a towel.
• Keep away from direct sunlight to prevent fading and material breakdown.
• Do not use a tumble dryer or any direct heat source.

Storing and Maintaining Your Leakproof Underwear

Once your leakproof underwear is completely dry, store it in a cool, dry place. Avoid folding them too tightly or storing in airtight containers, which can trap moisture and lead to mildew. If you have multiple pairs, consider rotating them so each pair gets equal use.

Over time, the absorbency may gradually decrease, but with proper care, you can extend the life of your underwear significantly. If you notice any lingering odors, a vinegar soak (1 part white vinegar to 4 parts water) for 30 minutes can help, followed by a thorough rinse. Avoid using baking soda, which can be abrasive.

• Store in a dry, ventilated area away from moisture.
• Use a vinegar soak occasionally to remove odors without damaging absorbency.
• Replace your leakproof underwear when you notice reduced absorbency or visible wear.

Taking care of your leakproof underwear doesn't have to be complicated. By rinsing promptly, washing with mild detergent in cold water, and always air drying, you'll preserve the absorbency and extend the life of your period underwear. Products like the Teen Leakproof UltraThin No-Show Boyshort 3-Pack and the Leakproof Contour Thigh Saver 6” are designed to last, but they rely on you to follow these simple care steps. Treat them well, and they'll take care of you.