Heavy Flow Seamless High Brief

Name: Heavy Flow Seamless High Brief
Rating: 4.89 (47 reviews)

$27.95 USD

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Absorbs up to 4 pads or tampons

PFAS-free, four-layer protection

Free first-size exchange

Not sure this absorbency is right for you? Find your match →

Color Black Apricot

Size S M L XL 2XL 3XL 4XL

Runs small — we recommend one size up from your usual size.

Smooth Comfort. Serious Protection.

Heavy-flow protection can feel secure, flattering and virtually invisible beneath your clothes, including activewear.

The EvaBody Heavy Flow Seamless High Brief combines a sleek, seamless finish with a supportive high-rise silhouette for dependable protection without unnecessary bulk. Its smooth construction sits discreetly beneath clothing, while the fuller fit provides comfortable coverage through the waist, hips and back.

Designed for heavier-flow days and overnight wear, it offers reliable absorbency to help you feel dry, secure and confident for longer. The soft, flexible fit stays comfortable as you move, making it a practical choice for work, busy days, travel and sleep.

It can also be worn for light bladder leaks, discharge or whenever you need added reassurance.

Smooth under clothing. Secure through heavier days. Protection you can rely on.

Product Features

Absorbency: 55ml, holds up to 4 pads or tampons

Best for: Heavy flow, all-day protection, and overnight protection

Style: Seamless High Brief

Smooth, seamless finish for a sleek look under clothing

High-rise design for added comfort and coverage

Material Composition

Body: 78% Nylon, 22% Spandex
Lining: 80% Polyester, 20% Nylon
Middle: 80% Polyester, 20% Nylon

Sizing

Our styles run small, so we recommend sizing up from your normal size for the best fit.

Not sure which size to choose? View our full Size Guide →

Still unsure? Don't stress, we offer a free first size exchange if your first EvaBody order isn't quite the right fit.

Our styles run small, so we recommend sizing up from your normal size for the best fit.

Not sure which size to choose? View our full Size Guide →

Still unsure? Don't stress, we offer a free first size exchange if your first EvaBody order isn't quite the right fit.

Size Chart

← Swipe sideways to view all sizes →

XS	S	M	L	XL	2XL	3XL	4XL	5XL	6XL
50–55	55–60	61–65	66–70	71–76	73–78	79–85	86–90	91–96	97–102
19.7–21.7	21.7–23.6	24.0–25.6	26.0–27.6	28.0–29.9	28.7–30.7	31.1–33.5	33.9–35.4	35.8–37.8	38.2–40.2
90–95	95–98	99–103	104–108	109–113	114–120	121–127	128–133	134–138	139–143
35.4–37.4	37.4–38.6	39.0–40.6	40.9–42.5	42.9–44.5	44.9–47.2	47.6–50.0	50.4–52.4	52.8–54.3	54.7–56.3
XXS	XS	S	M	L	XL	2XL	3XL	4XL	5XL
0	2	4	6	8	10	12	14	16	18
32	34	36	38	40	42	44	46	48	50
32	34	36	38	40	42	44	46	48	50
4	4–6	6–8	8–10	10–12	12–14	14–16	16–18	18–20	20–22
4	6	8	10	12	14	16	18	20	22
38	40	42	44	46	48	50	52	54	56
36	38	40	42	44	46	48	50	52	54

How Our Protection Works

Four Layers. One Smart Protection System.

EvaBody’s four-layer technology wicks away moisture, absorbs fluid and helps prevent leaks, while the soft outer fabric keeps you comfortable and confident throughout the day.

Explore our four-layer technology →

First Order Size Guarantee

Shopping for period underwear for the first time? We've got you covered.

If your first EvaBody order isn't the right fit, we'll send you one replacement in the correct size at no extra cost, and you can keep your original pair.

Simply contact us within 14 days of delivery.

PFAS-Free Guarantee

Every EvaBody period underwear style is independently tested and confirmed PFAS-free and is made with OEKO-TEX® STANDARD 100 certified fabrics, ensuring it is free from harmful levels of over 1,000 substances.

Care Instructions

To keep your EvaBody pieces performing at their best:

Before first wear

Machine wash on a cold or gentle cycle at a maximum of 30°C using mild detergent, then air dry completely. This helps prepare the absorbent layers for use.

After each use

Rinse in cold water until the water runs mostly clear.
Machine wash with similar colours on a cold or gentle cycle at a maximum of 30°C using mild detergent.
Do not use bleach or fabric softener.
Air dry completely in a well-ventilated area. Do not tumble dry.
Do not iron.

Read the full care guide →

No Harsh Chemicals
Easy Returns
Worldwide Shipping

View full details

Size Guide

Our styles run small, so we recommend sizing up from your normal size for the best fit.

Not sure which size to choose? View our full Size Guide →

Still unsure? Don't stress, we offer a free first size exchange if your first EvaBody order isn't quite the right fit.

Size Chart

← Swipe sideways to view all sizes →

XS	S	M	L	XL	2XL	3XL	4XL	5XL	6XL
50–55	55–60	61–65	66–70	71–76	73–78	79–85	86–90	91–96	97–102
19.7–21.7	21.7–23.6	24.0–25.6	26.0–27.6	28.0–29.9	28.7–30.7	31.1–33.5	33.9–35.4	35.8–37.8	38.2–40.2
90–95	95–98	99–103	104–108	109–113	114–120	121–127	128–133	134–138	139–143
35.4–37.4	37.4–38.6	39.0–40.6	40.9–42.5	42.9–44.5	44.9–47.2	47.6–50.0	50.4–52.4	52.8–54.3	54.7–56.3
XXS	XS	S	M	L	XL	2XL	3XL	4XL	5XL
0	2	4	6	8	10	12	14	16	18
32	34	36	38	40	42	44	46	48	50
32	34	36	38	40	42	44	46	48	50
4	4–6	6–8	8–10	10–12	12–14	14–16	16–18	18–20	20–22
4	6	8	10	12	14	16	18	20	22
38	40	42	44	46	48	50	52	54	56
36	38	40	42	44	46	48	50	52	54

5 stars: 42 (89%)
4 stars: 5 (11%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Really impressed

The high-rise fit is incredibly flattering and secure.

Highly recommend

Very absorbent and comfortable. The sizing runs slightly snug on me.

So comfortable

Love the seamless finish. No visible lines under dresses.

Highly recommend

These gave me the confidence to go to work on my heaviest days without worrying.

My new favourite

Great quality and soft fabric. Took me one cycle to get used to the thicker gusset.

Really impressed

Finally found period underwear that works for my heavy flow. No leaks and so comfortable.

My new favourite

I bought the apricot colour and it's beautiful. Doesn't show through light-coloured pants at all.

Really impressed

Really good absorbency and the high waist feels supportive. I just wish there were more colours.

Love these

The black pair is my favourite. I wore these overnight on day two of my period and woke up feeling completely secure.

Really impressed

So comfortable and smooth under leggings. I forget I'm even wearing period underwear.

Would absolutely recommend these

I saw EvaBody recommended online and now recommend these to my friends as well.

The best heavy-flow style I've tried

I've tried several brands and this is my favourite heavy-flow style by far.

A thoughtful design

You can tell a lot of thought went into the design because they're practical and comfortable.

The pair I keep reaching for

Every time they're clean I reach for this pair first.

These made my periods easier

These have genuinely made my periods easier to manage and less stressful.

I feel so much more confident

Since trying EvaBody I feel much more confident managing my heavier days.

Good quality and absorbency

Good absorbency and quality.

I can wear these under anything

I can wear these under leggings and work pants without any visible lines.

The fit exceeded my expectations

I wasn't expecting to love the fit this much. They sit perfectly on my body.

Worth every dollar

Honestly worth every dollar for the peace of mind they provide.

Exactly what I needed for work

I wear these to the office and never have to think about leaks anymore.

No bunching or rolling

They stay put all day and don't bunch or roll at all.

The seamless finish is fantastic

The seamless finish means I can wear these under fitted clothes without worrying.

Great for travel days

I packed these for a trip away and they made travelling during my period so much easier.

Really dependable for heavy flow

Really dependable for heavy flow days and I feel comfortable all day.

The Apricot colour is beautiful

The Apricot colour is beautiful and surprisingly practical under lighter clothing.

Finally slept through the night

I finally slept through the night because I felt secure in these.

Perfect after having my baby

I bought these from EvaBody after having my baby and they've been wonderful for post-partum light leaks.

The coverage is exactly right

The amount of coverage is perfect for me and never feels bulky.

I forget I'm wearing them

I completely forget I'm wearing these because they're so comfortable.

The black colour looks so sleek

The black colour looks polished and doesn't show through darker clothing.

Comfortable but I sized up

The protection is fantastic. I just sized up for my second purchase.

A pair I genuinely trust

This is one pair I genuinely trust on my heaviest days.

Soft enough for all-day wear

The fabric feels soft and smooth enough to wear from morning until bedtime.

Great protection and fit

Excellent protection and a flattering fit. I just wish I had discovered these sooner.

Country/region

Heavy Flow Seamless High Brief