Switching to period pants—or period underwear—can be a game-changer for comfort and sustainability during your cycle. But there’s one question almost everyone asks at first: How often should I change my period pants?
If you’re new to reusable period products, working out a routine that feels comfortable and hygienic can take some trial and error. That’s why we’ve put together this guide—to help you understand when to change your period underwear, how to keep it fresh, and how to make it last for years.
What are period pants and how do they work?
Period pants are reusable underwear designed with absorbent layers to catch menstrual flow, keeping you dry and leak-free. They’re a sustainable alternative to disposable pads or tampons and can hold the equivalent of multiple tampons’ worth of blood, depending on the style.
With a leak-proof outer layer, soft absorbent core, and moisture-wicking lining, period underwear offers an all-in-one solution: no extra products, no rustling packaging, and no emergency dashes to the shop.
Why it’s important to change period pants regularly
Wearing period pants longer than recommended can lead to discomfort, irritation, and even reduced product lifespan. Regular changes are key for:
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Hygiene – Fresh pairs help prevent bacteria build-up and odor.
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Comfort – Switching regularly keeps you feeling confident and dry.
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Longevity – Caring for your period underwear ensures it lasts for years.
How often should you change period pants?
The general rule of thumb
For most people:
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Moderate to heavy flow: Change every 4–6 hours.
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Light flow or spotting: Up to 6–8 hours is usually fine.
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Overnight use: Wear a high-absorbency pair and change first thing in the morning.
Always keep a spare pair handy for peace of mind. Read our blog all about how long period pants last to find out more.
Factors that affect changing frequency
1. Your flow
On heavy days, you’ll likely need to switch more often.
2. Absorbency level
Some period underwear is designed for light flow, while others handle heavier days.
3. Your daily routine
Travelling or exercising? Swap more often. Relaxing at home? You might go longer.
Signs it’s time to change your period pants
Your body is the best guide. Change your period underwear if you notice:
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Dampness or wetness
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Any sign of leaks
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Unpleasant odor
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Irritation or itching
Tips for staying comfortable and fresh
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Rotate between 3–5 pairs to get through a full cycle.
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Rinse with cold water after use, then machine wash.
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Avoid fabric softeners; they reduce absorbency.
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Always air dry to protect the fabric and elastic.
Caring for your period pants: a quick guide
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Rinse after use: Cold water helps prevent stains.
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Wash gently: Use a mild detergent and avoid bleach.
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Air dry: Skip the tumble dryer for longer-lasting underwear.
Read more details on our blog all about cleaning period pants.
Are period pants effective for heavy flow?
Absolutely. High-absorbency period pants are designed to hold the equivalent of several tampons. They’re not complicated to clean either—just rinse, wash, and dry.
Final thoughts: finding your routine with period underwear
So, how often should you change period pants? It depends on your flow, activity level, and comfort—but most people find a rhythm of every 4–6 hours works best.
With fewer disposables, less waste, and more comfort, period underwear is an empowering choice for your cycle. Once you find your groove, you’ll wonder why you didn’t switch sooner.
Blog disclaimer
Our blog is intended to share information and ideas around periods, health, and sustainability. While we do our best to keep content accurate and up to date, things can change over time. The information here is not intended as medical advice — for any health-related concerns, please consult a qualified healthcare professional. For more information on our claims, please see our Claims Page, and for the most up-to-date product information, please visit our Product Pages.
