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If you muscle through super heavy periods every month, you are not alone. Not by a long shot. On average, 1 in every five women suffers from heavy bleeding during their periods every year. In fact, heavy periods are one of the most common issues women experience in America. While it is normal for some women to have heavy periods every month, it doesn’t make it any easier to manage. It can be challenging to cope with and may affect daily life. Fortunately, there are products like period underwear that may help living with heavy periods a little less frustrating so you can go about your day with confidence, and focus on the stuff that really matters. 

What is considered a heavy period?

A heavy period is defined  by an excess amount of blood produced during the menstrual period. For instance, the average woman loses between 2 to 3 tablespoons of blood during her period. Additionally, the average period lasts between three to seven days. However, if you bleed more than three tablespoons and your period lasts longer than seven days, your period is considered heavy. 

How heavy menstrual bleeding can impact your life

Heavy bleeding can be dangerous if left untreated as it may pose health risks and prevent you from doing daily activities. If you are experiencing heavy bleeding that lasts longer than seven days and you bleed through a pad or tampon every 2 hours, it may be time to see a doctor. If a woman loses too much blood during her period, it may lead to an iron deficiency. Iron is responsible for creating red blood cells. In addition, if our bodies do not produce enough red blood cells, our bodies may not get enough oxygen, creating fatigue. 

Symptoms of heavy bleeding include:

  • Fatigue due to blood loss
  • Anemia
  • Needing to change a pad and tampon every two hours
  • Passing large blood clots
  • Period lasting longer than seven days
  • Painful period cramps

Top reasons to try period underwear for a heavy flow


Absorbency is essential during a period, especially if you have a heavy flow. Proof Leak Proof® has you protected from the lightest of your days to the heaviest day of your period. Our period underwear is designed with different styles and absorbency, so you may always be just as protected as you need. Deciding which absorbency level you need should not be difficult. We made finding the right pair of period underwear easy on our site with a breakdown of how much liquid each absorbency level holds. Not easy enough? When you find which absorbency level suits your need, you can  easily shop for all the product styles that address  the absorbency needed. Proof leak proof underwear offers a wide range of options:

Backup a tampon or cup 

Those with a heavy flow know how important it is to have protection from unexpected leaks. Period underwear is a great way to make sure pads or tampons don’t leak. What’s nice is that you can wear them during your whole period, even if you only need to wear a pad or tampon for a day or two. 


When we hear period underwear, we often worry about how comfortable it would be. So many questions come to mind: Does period underwear keep you dry? Will it feel bulky or feel like a swim bottom? We have good news! Proof Leak Proof® period underwear is designed to keep you dry and comfortable all day long. Our underwear has the look and feel of regular underwear, but with the added benefit, it protects you during your period. Each layer of our period underwear plays a vital part in offering the perfect protection.

Quick Wick layer: This quick-drying liner pulls moisture away from your body so you maintain a dry and comfortable feeling. 

Drop-Stop layer: Consists of three super absorbent layers custom knit with technical fibers. These fibers fight odors to keep you feeling fresh and clean. 

Seep-Shield liner: Although this layer is thin, it is powerful in providing breathable Leak Proof® protection. 

No-flo: This layer offers a soft, waterproof layer that ensures double protection against leaks.  

Leak-Loc® Edges and Extended protection: Nothing is worse than waking up in the morning after getting your beauty sleep to discover you ruined your favorite sheets. Our Leak-Loc® edges trap moisture and prevent any leaks onto any fabric. In addition, with the super-heavy absorbency, we offer an extra long Leak Proof® layer that creates an extended coverage from front to back to ensure nothing can leak out. 

What to look for in period underwear for heavy flow

Here are some characteristics of period underwear to look for, regardless of the brand you choose to help you control your heavy flow:


Absorbency is vital when looking for protection against a heavy flow period. If you do not have the proper absorbency level, you may experience leaks. 

To be cautious, try wearing period underwear as a backup to your period underwear when you are just starting. This will help you determine which level is appropriate for you while discovering what works for your particular flow. 


It is important to find period underwear that contains materials that will pull moisture away from the body and contain it to keep you feeling dry and comfortable. 

Light-weight and complete coverage

Let’s face it, we want to feel comfortable and not have a bulky feeling during our periods. Therefore, getting period underwear that won’t feel like an adult diaper is essential. Proof® takes pride in providing underwear that is light-weight and discrete. You won’t even notice you have period underwear on.

Best leak proof underwear for Heavy Flow

Leakproof Bikini Underwear:

  • Holds up to 4 regular tampons or 8 teaspoons of liquid
  • It comes in sizes xs-xl
  • Offers total front-to-back leak protection from the front waistband to the back waistband
  • Our bikini is designed with breathable and Leak Proof® protection. 
  • Keeps you feeling dry 

The benefits of choosing period underwear for heavy periods are clear. Period underwear is comfortable, discrete, and reusable. Proof® is committed to providing reusable products that boost confidence and allow you to make the most of every day, regardless of the flow. So, why not choose the most effective AND reusable option? That’s what  we thought too. 

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