Heavy Flow Classic Cotton Boyshort

Name: Heavy Flow Classic Cotton Boyshort
Rating: 4.84 (32 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 Grey

Size XS S M L XL 2XL 3XL 4XL

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

Classic Comfort. Serious Protection.

Heavy-flow protection can feel soft, secure and easy to wear every day.

The EvaBody Heavy Flow Classic Cotton Boyshort combines a soft cotton-rich body with a supportive, full-coverage silhouette through the hips, back and upper thighs. Its clean, sporty design offers a comfortable, stay-put fit that moves with you and feels more like your favourite everyday underwear than a traditional period product.

Designed for heavier-flow days and overnight wear, it provides dependable absorbency to help you feel dry, comfortable and confident for longer. The boyshort cut offers added coverage and reassurance, making it a practical choice for busy days, sleep or whenever you want a little more support.

It can also be worn for light bladder leaks, discharge or added backup protection. Available in black and grey, it is an easy, versatile staple for your period underwear rotation.

Soft cotton comfort. Secure coverage. Protection you can rely on.

Product Features

Absorbency: Holds up to 4 pads or tampons
Best for: Heavy flow, light incontinence, vaginal discharge, and overnight protection
Style: Classic Boyshort
Full-coverage fit for added comfort and security
Soft cotton-rich fabric for everyday wear
Available in grey and black

Material Composition

Body: 95% Cotton, 5% Spandex
Lining: 95% Cotton, 5% Spandex
Middle: 80% Polyester, 20% Elastane

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: 27 (84%)
4 stars: 5 (16%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Comfort and confidence in one pair

Comfortable, supportive and genuinely confidence-boosting.

Would happily recommend these

I recommended these to my sister after trying them and she loves them too.

The boyshort cut feels so secure

The boyshort cut makes me feel so much more secure than other styles I've tried.

One of the best purchases I've made

One of the best things I've bought this year. I didn't realise how much peace of mind period underwear could give me.

Good quality and easy to wash

Good quality and easy to care for. They washed really well after several cycles.

Exactly what I wanted for overnight use

Exactly what I wanted for overnight protection without feeling like I was wearing something bulky.

The fit is incredibly comfortable

The fit is incredibly comfortable and doesn't dig into my waist.

Perfect for active days

I wear these for long walks and active days because they feel secure and don't shift around.

I can wear these around the house all day

I can spend an entire day at home in these and never feel uncomfortable.

This style exceeded my expectations

This was my first EvaBody purchase and I was genuinely impressed by the quality and comfort.

The extra coverage is reassuring

The extra coverage gives me peace of mind, especially overnight.

Soft and reliable but I sized up

Very soft and reliable. I just preferred sizing up for a slightly roomier fit.

Feels like wearing regular shorts

They honestly feel like soft cotton shorts, which makes them so comfortable around the house.

These have made my periods less stressful

Since buying these, my periods feel much easier to manage and less stressful.

Comfortable enough for long flights

I wore these on a long-haul flight and felt comfortable the entire time.

No leaks during a busy workday

I wore these to work on a very heavy day and didn't think about my period once.

Really good but I prefer bikini styles

The quality is excellent. I just tend to prefer bikini cuts personally.

A pair I reach for every month

Every month I end up reaching for this style because it feels the most dependable.

The grey colour is surprisingly nice

I didn't expect to love the grey colour so much. It looks really modern.

These stay put all day

These stay comfortably in place even when I'm running around after my kids.

I finally found a pair I trust overnight

I finally have period underwear I trust enough to wear through the night.

Great absorbency and soft fabric

The fabric is soft and the protection is excellent. I just went up a size on my second order.

Secure without feeling restrictive

I never feel restricted in these even though they offer a lot of coverage.

The black pair has become my go-to

The black pair looks sleek and has become my favourite style for overnight wear.

I bought these for my daughter

I bought a pair for my teenage daughter after she started her period and she now asks for these every month.

Perfect for post-partum recovery

I bought these a few weeks after having my baby and they've been wonderful for post-partum light leaks and comfort.

Very comfortable but a little warm for me

The absorbency is fantastic. I just personally run warm and prefer this pair in cooler weather.

Love the sporty fit

The sporty fit is so comfortable and doesn't ride up at all.

My favourite for heavy days

This is the first pair I reach for when my period starts because I know I can rely on it.

The coverage is exactly what I needed

The extra coverage through the hips and thighs makes me feel so much more secure on heavy days.

Really comfortable for sleeping

These are really comfortable for sleeping.

A practical style that still feels nice

I love that this style is practical without looking frumpy or bulky.

Country/region

Heavy Flow Classic Cotton Boyshort