How Period Underwear Works
What is period underwear?
Period underwear looks and feels like normal underwear — but it's built with special absorbent, leak-resistant layers sewn right in. That means it soaks up your flow, locks away moisture, and keeps you dry and protected, with no pad and no tampon needed (or as reliable backup when you want extra security).
The layers (how it protects you)
UnderX underwear works in four smart layers:
- Moisture-wicking top layer — pulls wetness away from your skin so you feel dry.
- Absorbent core — soaks up and holds your flow.
- Leak-proof barrier — stops anything from passing through to your clothes.
- Soft breathable outer — comfortable, breathable, feels like everyday cotton.
Like pads come in different sizes, period underwear comes in absorbency levels: Light, Regular, Heavy, and Overnight. Pick based on your flow — or mix, using lighter pairs early/late in your cycle and heavier pairs on your strongest days. (Final tiers per Product-Catalog.)
How to use it — 3 simple steps
1. Wear it
Put it on like any underwear. On light or medium days, wear it on its own. On heavy days or overnight, wear it alone (heavy/overnight style) or as backup with a tampon/cup for total peace of mind.
2. Rinse & wash
- Give it a quick cold rinse after wearing (until the water runs clear).
- Then machine wash cold or hand wash with mild detergent.
- Air dry. Don't use bleach, fabric softener, or the dryer (it shortens the life).
➡️ Full care guide
3. Reuse — for years
Each pair lasts 2+ years with proper care. Build a small "wardrobe" so you always have a clean pair ready.
How many do I need?
Most people need 4–7 pairs to comfortably get through a full cycle (so you always have clean pairs while others wash and dry). Heavy flow or fewer laundry days? Lean toward 7+.
➡️ Find your size & build your set
Is it hygienic?
Yes. You rinse and wash it just like the rest of your laundry. The absorbent core locks moisture away, and proper washing keeps it fresh and clean. Many women find it cleaner and more comfortable than sitting on a disposable pad all day.
Why women switch
- No leaks, real confidence — especially overnight and at work or school.
- Comfort — soft, breathable, no bulky pad, no string.
- Savings — buy once, wear for years, stop the monthly pad spend.
- Less waste — fewer disposables in the bin.
Ready to try?
➡️ Still have questions? · ➡️ Shop starter sets
Related
FAQ · Care-Instructions · Sizing-Guide · Homepage · Product-Catalog