You Ask, AuntFlo Answers

Our 2.0 Range is the new, upgraded line built with the full front-to-back gusset for maximum protection.

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Sizing can change from product to product! Check the style you want and measure yourself using the size chart shown on that specific product page.

Some styles fit tighter for extra protection, while others are cut looser to allow for stretch and movement.

If you have any sizing questions, just reach out to our friendly team and we'll help you out.

Our period undies rely on a combination of specialised layers built to absorb, wick moisture away and stop leaks. Here's how these 4 layers of leak-proof protection work together.

1. Absorbent Layer (Closest to Skin)

• Function: This layer absorbs menstrual fluid quickly so you stay dry and comfortable. It draws moisture off your skin and prevents the dampness that can cause irritation.
• Materials: A blend of cotton, bamboo and other moisture-wicking fabrics keeps you feeling fresh all day long.

2. Moisture-Wicking Layer

• Function: This layer carries the moisture captured by the first layer away from your body and into the next one, so your skin stays dry and comfortable. It also helps stop leaks by keeping dryness consistent.

3. Absorbent Core Layer

• Function: This thicker core is the key layer against leaks. It holds a large amount of menstrual fluid — often the equivalent of 2-3 tampons — and handles moderate to heavy flows without leaking through.

4. Leak-Proof, Waterproof Barrier Layer

• Function: The outer layer acts as a barrier so absorbed fluid never reaches your clothing. This waterproof layer keeps you leak-free while you move, sit or sleep.

How It All Works Together:

Together these 4 layers — absorbent, moisture-wicking, absorbent core and waterproof barrier — keep you dry, protected and comfortable through your whole period. They can be worn on their own or as backup to other menstrual products such as tampons or cups for extra protection on heavier days.

Thanks to the leak-proof design, you can wear period underwear with confidence, knowing you're well protected day and night, even while walking, sitting or exercising.

When to change your period underwear depends on a few things: your flow, the absorbency of the pair you're wearing and your own comfort. Here are some general guidelines to help you decide:

1. Flow Level

• Light Flow: With a lighter flow you can usually wear a pair for up to 8 hours before changing, depending on the absorbency rating of the style.
• Moderate Flow: On a moderate flow, change roughly every 6-8 hours, especially if you notice any dampness or discomfort.
• Heavy Flow: On heavy days it's best to change every 4-6 hours to avoid leaks. You may need to change more often depending on how much has been absorbed.

2. Signs of Full Absorbency

• Feeling Damp or Wet: If you start to feel moisture through the fabric, the pair has reached its capacity and it's time to change.
• Discomfort: If the underwear starts to feel uncomfortable or you notice the fabric sticking to your skin, change them to keep comfort and hygiene.

3. Personal Comfort

• If you start feeling less confident or comfortable — even before the absorbency limit is reached — go ahead and change. Comfort is what keeps you feeling secure through your period.

4. Activity Level

• If you're very active — exercising, swimming or moving around a lot — you may need to change more often. More movement can shift absorption levels, and a fresh pair keeps leaks off the table.

5. End of Day / Overnight Use

• Wearing them overnight? Change after 8-12 hours depending on your flow. On a very heavy flow, consider pairing them with a cup or tampon for extra protection.

Above all, listen to your body and change whenever you start feeling uncomfortable, to keep both confidence and hygiene.

Wash your undies regularly, and always rinse them before putting them in the machine.

For the most hygienic result, we recommend these washing steps:

1. Pre-rinse in cold water

2. Wash at temperatures under 30°

3. Remember to stretch them out for the comfiest fit.

4. Hang dry

Yep, it's that easy!

Yes, period underwear can last the entire work or school day, though it depends on a few factors: your flow, the absorbency of the style and your personal comfort.

For lighter to moderate flow, a single pair comfortably covers the whole work or school day.

For heavy flow, you may want a backup product or one change during the day.

They don't! We know no two menstrual experiences are the same, so each pair is designed for a different level of flow.

Check the rating shown on every product page (the droplets in the top corner).

Our period undies are PFA free. PFAs are absolutely not part of our product design.

Nope, it's just us! Our underwear is available only through our own online store (for now).

We're an independently operated business. Producing period undies requires machinery and specialised technical skills found in global garment manufacturing hubs, so we partner with two excellent manufacturing partners to produce our garments.