How to Wash Period Underwear Without Ruining Absorbency
By Shop Period Underwear | Love Luna Period Underwear | Published: 2026-10-15
Category: Tips & Care
Rinse in cold water, use gentle detergent, and air dry to keep period underwear absorbent. Follow these steps to protect the layers that lock away flow.
Quick answer
Rinse your period underwear in cold water immediately after wearing, wash with a small amount of gentle detergent on a delicate cycle or by hand, and always air dry. Skip fabric softener and heat, which coat or damage the absorbent layers and reduce how much fluid they can hold.
Why cold water and gentle detergent protect absorbency
Hot water can set stains and weaken the fibers that wick and lock away fluid. Cold water rinses away blood without forcing it deeper into the layers. Use a mild, fragrance-free detergent—regular detergent with enzymes, bleach, or fabric softener leaves residue that blocks absorbency over time. For reusable period underwear laundry, a small amount goes a long way; too much soap is hard to rinse out and can irritate sensitive skin.
- Check the care label first—some styles, like Love Luna's Reusable Regular Pad - Black, specify 100% cotton on upper and outer layers, which benefits from gentle handling.
- Avoid detergent with added softeners or optical brighteners.
How often to wash and what to do between wears
Wash after every wear, even if the flow was light. If you can't wash immediately, rinse thoroughly and hang to dry until laundry day—do not let soiled underwear sit damp in a hamper, as odor and bacteria can set in. For heavy days, a quick pre-rinse before the main wash helps. If you use a pad like the Reusable Regular Pad - Black, which absorbs up to 15ml, rinse it as soon as you change it to keep the 4-layer protection working effectively.
Step-by-step wash routine
- Rinse immediately in cold water: Hold the underwear under cold running water until the water runs clear. If you can't rinse right away, soak in cold water for 30 minutes before washing. Avoid hot water, which sets stains and can damage absorbent fibers. Checkpoint: water should be clear, not pink or brown.
- Wash with gentle detergent: Use a mild, fragrance-free detergent—about a teaspoon for hand washing or the recommended amount for a delicate machine cycle. Never use fabric softener, bleach, or detergent with enzymes. For machine washing, place in a mesh laundry bag and choose a cold, gentle cycle. Checkpoint: no suds left after rinsing; if there are, rinse again.
- Air dry away from direct heat: Lay flat or hang to dry in a well-ventilated area, out of direct sunlight. Avoid tumble drying, radiators, and hair dryers—heat breaks down the waterproof layer and elastic. Drying may take longer for thicker styles like the Super Period Short, but it preserves absorbency. Checkpoint: underwear is completely dry before storing to prevent mildew.
Product care details
- Reusable Regular Pad - Black: Reusable Regular Pad - Black: absorbs up to 15ml, 4-layer protection, 100% cotton upper and outer layers, V-shaped straps. The cotton layers need gentle washing to stay soft and absorbent; the V-shaped straps can lose hold if washed in hot water or dried on high heat.
- Super Period Short - Black: Super Period Short - Black: absorbs approx. 40ml (5-6 regular tampons), 5 clever layers. More layers mean more rinsing to remove all detergent; a thorough cold rinse keeps the 5-layer system from trapping residue that reduces absorbency.
