Period Pants Hero


Period Pants Guide: Everything You Need To Know

Our period underwear are a comfortable and convenient option for tackling your period.

Jodie Spragg
by Jodie Spragg
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What Are Period Pants?

Period Pants are reusable underwear designed to provide reliable protection during periods. They typically have a built-in absorbent layer that can hold a significant amount of fluid for both light and heavy periods, allowing you to go about your day with confidence.

3pk Period Underwear Mini Briefs
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2pk Seamless Period Underwear Mini Briefs
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Benefits of period pants

  • Environmentally friendly: By using reusable period pants, you can significantly reduce your contribution to the waste created by disposable pads and tampons.

  • Cost-effective: While the initial investment in period pants may be higher than disposable products, they can save you money in the long run as they are reusable.

  • Comfortable: Many people find period pants more comfortable than traditional period products, as they don't have to deal with the discomfort of pads or tampons.

  • Convenient: With period pants, you don't have to worry about running out of pads or tampons, as long as you have enough pairs to get you through your cycle.

How Does Period Underwear Work?

Our clever period-proof underwear contains three layers of protection in the gusset, which is wider and longer than it would be in your regular underwear. The top layer wicks moisture and fluid down to the second layer, where it is absorbed. The final fabric layer has a thin, breathable, and waterproof gel to help control any pesky leaks. Our period underwear also uses an anti-microbial treatment to help prevent bacteria, neutralise odours, and maintain hygienic freshness.

When it comes to deciding how long you can wear period pants for, it's important to judge your personal comfort and the amount of flow you're experiencing. Most period pants can last for 8-12 hours, but this can vary depending on your individual needs. If you've decided to give period pants a try, you might be wondering which style is right for you. With so many options out there, it can be overwhelming to choose. That's why we've put together a list of the best period pant styles to make your decision a breeze!

High Waisted Period Underwear

High waisted period pants are a popular choice because they provide extra coverage and support. They're perfect for those who prefer a more secure fit and want to avoid any risk of leaks.

Seamless Period Underwear

For a truly invisible look, seamless period pants are the way to go. These are great for wearing with tight-fitting clothing, as they won't create any visible lines.

Heavy Flow Period Pants

Heavy flow period pants are designed with extra absorbency to keep you feeling dry and confident. Even on your heaviest days, our trusty high waisted period underwear has got your back!

Light Flow Period Pants

light flow period pants offer a lighter absorbency and are more breathable and comfortable, making them perfect for all-day wear. And why not add a touch of flair to your wardrobe by pairing them with a trendy bra? 

Period Pants

How to Wash Period Pants

  • Rinse – clean your period pants under cold water.

  • Wash – wash your period underwear in the washing machine, following the care instructions on the label. Avoid using fabric softener as this can slightly reduce the performance of the absorbent layer in the gusset

  • Dry - Hang them up outside or on a drying rack indoors and let them air dry completely before wearing them again.

Can you tumble dry period pants?

As for drying, it's best to hang dry your period pants instead of using a tumble dryer, as the high heat can damage the absorbent layer and elastic in the waistband.

Period Proof Swimwear

Don’t let your period put you off diving in making a splash. Our practical and discrete period swimwear means you can take to the pool or beach with confidence. Our period-friendly swimwear bikini bottoms can be used in place of tampons or as extra peace of mind on your heavier days. Choose from classic black bikini bottoms or our high-waisted option, then mix and match them with your go-to bikini top. We have a wide selection of women’s bikinis to choose from. Browse our range and find the best period swimwear for you!


Where can I buy period swimwear in store?

If you have found the perfect period pants on our website, you can easily pop into one of our Primark stores and pick it up in person. Period pants can be found in our lingerie and nightwear section, while period swimwear is available in our beachwear section.

Can you wear period pants all day?

Absolutely! In fact, period pants are designed to provide long-lasting protection and comfort. You can wear them all day for up to 12 hours without any worries.

How often do you change period pants?

It's recommended to change your period pants every 8-12 hours or as often as you would change a regular pad or tampon.

How many pairs do I need?

It's a good idea to have a few pairs of period pants so you can rotate them throughout your cycle. Depending on your flow and frequency of laundry, 2-4 pairs should suffice.

Do you wear period pants on their own?

Yes, you can wear period pants on their own or as a backup to other period products.

Can I wear period underwear in combination with other sanitary products?

Yes! Period underwear can be worn alone and replace cups. tampons and sanitary towels but also work well as added protection on heavier flow days.

Who should use period underwear?

Anyone who menstruates can use period underwear. They're a great option for people who want an eco-friendlier and comfortable alternative to traditional period products.

Is period underwear sanitary?

Yes, period underwear is designed to be sanitary and hygienic, as long as they are washed properly on a delicate or gentle cycle. Make sure to follow the care instructions on the product to maintain their effectiveness and avoid placing them in high heat environments like a tumble dryer.

Do period pants leak?

Like any menstrual product, there is always a chance of leakage. However, period pants are designed to provide reliable protection and have been thoroughly tested for their effectiveness. Just make sure you change your period pants after 12 hours.

Would they work after having a baby?

Period pants can be a great option after having a baby, but it's important to wait until any postpartum bleeding has stopped. Look for styles with a higher absorbency and a comfortable fit that won't irritate any postpartum healing.

Can you wear period pants to the gym?

Yes, you can wear period pants to the gym. Look for styles with moisture-wicking fabric to keep you feeling dry and comfortable under your women’s activewear during your workout.