# Reusable LeakBlock Moderate Flow Period Underwear L

## What it is

The Reusable LeakBlock Moderate Flow Period Underwear L is a UVA wellness product. Positioned for for-him and for-her. Current price: $25.99 (retail value $29.00). In stock.

## Key facts

- Brand: UVA
- SKU: 100492
- MPN: 100492
- Category: for-him, for-her
- Condition: new
- Ships to: United States, in plain unmarked packaging
- Returns: unopened items in original packaging within 30 days (hygiene restrictions apply to used products)
- Card statement reads: XDIPX

## Emma's take

Leakproof protection that feels like your favorite underwear, not a pad.

This moderate-flow pair is built for the days you want to forget you're on your period at all. Four layers of LeakBlock protection and a breathable, waterproof lining are rated for up to 12 hours, from a full workday to a flight to a sweaty gym session. If your flow runs heavier, the Heavy absorbency version is the better match. Wash cold, skip the dryer, and the leak barrier keeps working wash after wash.

## Specifications

- Absorbency: Moderate flow, up to 12 hours protection
- Technology: 4D/5D LeakBlock multi-layer leak protection
- Fabric: Ultra-thin, breathable, soft stretch
- Body material: 88% Nylon, 12% Elastane
- Lining: Moisture-wicking, breathable waterproof TPU layer
- Certification: OEKO-TEX Certified
- Care: Reusable and washable
- Size: L

## What's in the box

- 1x pair period underwear, size L

## Care instructions

- Rinse in cold water before the first wear to prime the barrier.
- Machine wash cold on gentle, skip fabric softener and bleach.
- Air dry only, the waterproof TPU layer can't handle a dryer.
- Store dry and flat, away from direct heat or sunlight.
- Replace after roughly a year of regular wash cycles.

## Frequently asked questions

## How does this period underwear actually stop leaks?

It layers four to five protective layers together: an absorbent core, a moisture-wicking lining, and a breathable, waterproof TPU layer on the outside. That combination is what the brand calls LeakBlock, built to absorb menstrual flow while keeping the outer layer dry.

## How many hours of protection do these period panties give?

This pair is rated for the Moderate flow level, good for up to 12 hours depending on how heavy your flow runs that day. If you're consistently heavier, the brand also makes a Heavy absorbency version worth checking out.

## What's the right way to wash period underwear to protect the leak barrier?

Rinse in cold water first, then machine wash on a cold, gentle cycle. Skip fabric softener and bleach, since both can break down the waterproof lining over time, and let them air dry instead of tossing them in the dryer.

## Can I wear these for exercise, sleep, or travel days?

Yes. The fabric is designed to be ultra-thin and breathable without added bulk, so it's made for work, exercise, sleep, and travel days alike, not just as a backup layer.

## Do I still need a pad or tampon with these?

No, that's the point. These are built to be worn on their own for full leak protection, though plenty of people layer them as backup on heavier days or overnight.

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Canonical: https://xdipx.com/products/uva-moderate-flow-period-panties-l
Last updated: 2026-10-16
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