Heavy Flow Reusable Leakproof Period Underwear XL
All-day leak protection that quietly outperforms your comfiest underwear.
How it feels
- Retention
- Discretion
- Body-safe material
- Comfort during use
- Versatility
- Ease of cleaning
Pick a color to see availability.
What it does
FAQs / Q&A
How many hours of leak protection does this heavy-flow pair provide?
Per the spec sheet, the Heavy absorbency style is built for up to twelve hours of protection, depending on your flow. The multi-layer LeakBlock construction, an absorbent core, moisture-wicking lining, and a waterproof TPU layer, is designed to handle the heaviest days without leaks.
Can I wear this on my heaviest period days instead of a pad?
Yes, this style is the Heavy absorbency option in UVA's lineup, built for the days that need the most coverage. It's common for first-time users to keep a light backup nearby until they learn their own flow and change schedule.
How do I wash and care for reusable period underwear?
Rinse the garment in cold water right after wear, then wash and air dry rather than using a dryer. Skip fabric softener, since it can coat the absorbent and waterproof layers and reduce how well they perform over time.
Does this period underwear control odor as well as leaks?
Yes. The product description lists odor control as one of the LeakBlock technology's jobs, working alongside moisture-wicking and leak protection in the same multi-layer core.
What's the difference between this Heavy style and the Light or Moderate options?
UVA builds the same LeakBlock technology into Light, Moderate, and Heavy absorbency levels, so the difference is how much flow each is designed to hold. This XL pair is the Heavy option, built for the fullest days of your cycle.
Care Instructions
- Rinse in cold water right after wear to release trapped flow.
- Skip fabric softener, which can coat the absorbent layers over time.
- Air dry rather than machine dry to protect the elastane and TPU layer.
- Store clean and fully dry to prevent odor buildup between wears.
In the box
- 1x pair Heavy Flow period underwear, size XL
Specs
- Absorbency level: Heavy
- Protection: Up to 12 hours depending on flow
- Body fabric: 88% Nylon, 12% Elastane
- 1st layer: 91% Polyester, 9% Elastane
- 4th layer: Breathable, waterproof TPU
- Certification: OEKO-TEX Certified
- Care: Reusable and washable
- Size: XL
Emma's take
One of the ones worth quietly recommending over coffee ♥
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Body-safe materials
Medical-grade silicone, glass, and steel, named on every product page.
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