1. Home
  2. /
  3. Women
  4. /
  5. Women's Underwear
  6. /
  7. Period & Leak-Proof Underwear
  8. /
  9. Period & Leak Proof - Full Brief - Moderate - Heavy
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
XS-4XL
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
XS-4XL
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black
Period & Leak Proof - Full Briefs - Moderate - Heavy - Black

Period & Leak Proof - Full Brief - Moderate - Heavy

In Period Seamfree Fabric

£18.00GBP
Colour:
Size
Help Find My Size
Pack Size

Spend £45+ for Free Regular Shipping, or £80+ for Free Express Shipping

Earn 18 points when you purchase this product  Log in
Features
Breathable
Leak Proof Technology
Non-Toxic
Odour Resistant
PFA Free
Moderate - Heavy Absorbency
Size & Fit
Runs small
True to size
Runs large
  • High-rise design for optimal coverage and comfort.
  • Soft wide ribbed waistband and seamfree construction for added comfort.
  • Machine washable with fast-absorbing leakproof technology.
  • Double-layered towelling gusset ensures freshness and dryness.
  • Designed for moderate to heavy period days, occasional light bladder leaks, and discharge.
  • Absorbency: Up to 3 regular tampons, up to 3 regular pads, holds 15ml.
  • Certified as 100% PFA-free.
Outer: 79% Viscose made from bamboo, 15% Nylon, 6% Elastane. Gusset 1 : 100% Cotton. Gusset 2: 72% Viscose made from bamboo, 28% Cotton. Gusset 3: 86% Modal, 7% Seaweed Fibre, 7% Elastane.
Wash before wear, after use rinse with cold water until water runs clear. Machine wash cold with similar colors, gentle cycle. Do not bleach. Do not tumble dry, flat dry in shade. Do not iron. Do not dry clean.
  • Free Standard Shipping on UK orders over £45.
  • Free Express Shipping on UK orders over £80.
  • Fast delivery, track your order easily. Learn more about shipping and delivery.
  • Easy returns process, hassle-free policy.
  • Returns accepted within 30 days of purchase.
  • Only unopened Intimates can be returned. Learn more about our returns policy.
Size chart
We are here to help you choose your perfect fit
UNDERWEAR SIZE CHART
Model Bio
Model's Photo - Laura De Wit

Laura


Height:176cm (5' 9")
Waist:62cm (24.4")
Bust:82cm (32.3")
Hips:90cm (35.4")
Wears: Size S Boody Bottom

Model's Photo - Caitlin Murphy

Caitlin


Height:183cm (6' 0")
Waist:86cm (33.9")
Bust:100cm (39.4")
Hips:121cm (47.6")
Wears: Size XL Boody Bottom

Model's Photo - Jessica Turnbull

Jessica


Height:171cm (5' 7")
Waist:98cm (38.6")
Bust:121cm (47.6")
Hips:141cm (55.5")
Wears: Size 2XL Boody Bottom

Complete The Look

Period & Leak Proof - Full Brief - Moderate - Heavy

Why is this product perfect for you?

  • High-rise design for optimal coverage and comfort.
  • Soft wide ribbed waistband and seamfree construction for added comfort.
  • Machine washable with fast-absorbing leakproof technology.
  • Double-layered towelling gusset ensures freshness and dryness.
  • Designed for moderate to heavy period days, occasional light bladder leaks, and discharge.
  • Absorbency: Up to 3 regular tampons, up to 3 regular pads, holds 15ml.

Why We Made This

All the comfort and breathability of our regular Full Brief undies but with added reliable, stress-free protection. Featuring four-layer, fast-absorbing leakproof technology that holds up to 3 regular tampons, keeping you fresh and dry. All our Period & Leak Proof Underwear is PFAS and Silver free, as it should be.

Frequently Asked Questions

Here are the questions other people ask about this product.

They feature a high-rise fit that provides full stomach and bum coverage. If you’re a fan of our Original Full Briefs, these are for you.

They offer Moderate to Heavy absorbency, holding up to 15ml, equivalent to up to 3 regular tampons or 3 regular pads.

Yes. Designed for moderate to heavy flow days, many people wear them comfortably throughout the day, depending on personal flow and preference.

The underwear features fast-absorbing, built-in leak protection, including a single-layer towelling gusset that helps absorb moisture and keep you feeling dry.

No. The absorbent layers are integrated into the underwear, so they feel much more like your everyday underwear.

Yes. They are certified 100% PFAS & Silver free, meaning they do not contain harmful forever chemicals.

Yes. Reusable period underwear can save money over time compared to continually buying disposable products.

You can machine wash them with your regular laundry on a cool wash, up to 40°C/104°F. Avoid fabric softener and tumble drying to help maintain the leak-proof technology.

The Period & Leak Proof Full Briefs Moderate to Heavy are available in extended sizing; XS-4XL.

Overall rating: 4.620339 / 5 from 295 reviews.

AI Generated Review Summary

These period and leak proof briefs offer great comfort and coverage for moderate to heavy protection. Customers appreciate the soft fabric, high absorbency, and lack of leaks. The fit and waistband are also praised for their comfort and ease of use.

Summary topics

  • Absorbency (6%): Customers raved about the absorbency of the product, with multiple reviewers mentioning its great coverage and absorbency.
  • Fit (8%): Customers expressed appreciation for the perfect fit of the product, with multiple reviews mentioning its comfort and padding.
  • Period Protection (6%): It was observed by customers that these undies are the most comfortable and great for heavier periods.
  • Fabric Comfort (9%): Customers keep praising the lovely soft fabric that does not dig in, breathable, and absorbency.
  • Leak Protection (10%): Customers expressed appreciation for the lack of leaks and comfort provided by these undies, making them the best choice.

Review topics: ["size","fit","fabric","support","waist","material","design","issue","quality","look","feel","pants","shape","comfort","style","undies","stretch","coverage","padding","underwear","protection","band","comfy","leaks","period","absorbency","briefs","waistband","proof","gusset"].

Review highlights

  • "Just what I was looking for on those heavy days - good coverage and nice soft fabric." — Amy B.
  • "Lovely soft fabric, comfortable supportive and effective design." — Annie H.
  • "I had no issues with leaking and felt confident and comfortable." — Ms P.

Reviews

Happy customer

"I had to buy more period underwear as my previous ones either leaked or felt uncomfortable especially when having a heavy period. I have just tried out this brand and I could not be happier. I went for the heavy flow underwear as my cycle can be unpredictable and I can now report that as well as being comfortable to wear for long periods of the day I have had no more leakage or staining my clothes to worry about which is a weight of my mind."

— J C. (5/5)

Definitely worth it!

"I was skeptical about period undies. I have heavy periods and have always used tampons and liners. But since trying these moderate-heavy undies, I can't see myself going back. They're much more comfortable than pads and super absorbant. I only bought a few to start with to test them out. After a period with them, I have quickly bought more (5-6 total) so that I have enough for a full period, they're so comfy! I can see myself wearing them for sports as this postpartum pelvic floor isn't what it used to be. Great peace of mind!"

— Verity S. (5/5)

Comfy but improvement needed

"Comfortable as all Boody underwear is, but disappointing the leakproof insert doesn't come up higher at the front for better coverage & security. The coverage of the leakproof panel needs to be more clearly stated in all Boody period underwear, as photos do not display this."

— Justine M. (4/5)

Nice period briefs

"First time using period briefs and it was better than expected. The padding covers a large part of the briefs and it was very easy to clean it. The padding does get a bit warm after a while. Still, the briefs are very comfortable."

— Paloma A. (5/5)

Too cheeky for me

"I'm not really into the cheeky style. I prefer more bottom coverage. But I had no leak issues with these. The quality seems good. I've only worn once so far."

— Holly D. (3/5)

Absorbent and stay fresh all day

"The best period knickers I have ever bought. Very comfortable, breathable and make me feel very confident on my period."

— Michelle M. (5/5)

The best period underwear I’ve ever had

"These are perfect! Comfort, effectiveness, and sizing are all excellent."

— Chrissy T. (5/5)

The most comfortable period briefs

"My daughter says out of all the brands she's tried these are the best by far. We're slowly replacing all the other ones with these ones."

— Felicity F. (5/5)

Very comfy

"The material is so soft and I stayed comfortable on one of the hottest days of the year!"

— Geoline H. (5/5)

These are really robust! The

"These are really robust! The weight of them certainly indicates there is a lot of absorption there. Though they are weighty they are super comfortable"

— Lesley N. (5/5)

Q&A

Please make this in a Boyleg/shortshort with the soft high waist
We really appreciate your feedback Kim. We've passed your suggestion on to our Design Team. You may be pleased to hear that they are actively reviewing and tweaking our Period & Leak Proof range, so this feedback is much appreciated. Be sure to sign up for our mailing list, as that will ensure you're the first to know about any of our upcoming product releases. Thank you!

On the Grid

Follow @boody