Heavy Flow Period Underwear – 4-Layer Leakproof Brief, Reusable, XS–6XL
Free Shipping & Easy Returns
10% Off When You Buy 2+ Items
Details
Heavy flow · 4 layers · Reusable
Period Underwear That Holds Up on Your Heaviest Days
Pads that shift, tampons to change, the worry about leaks at night. These soft period briefs hold up to the equivalent of 8 tampons, so you can get through a heavy day or a full night with one pair, then simply wash it and wear it again.

Real life
Worn, washed and worn again

In everyday use

In everyday use

In everyday use

In everyday use

How it works
4 layers of leak protection
Only the gusset has the extra layers, so you feel protected without the bulk. The rest of the brief is as thin as regular underwear.
- Comfort layer: the soft, breathable inner layer feels comfortable all day.
- Absorbent layer: quick-drying and spreads the flow evenly, so you stay feeling fresh.
- Moisture barrier: keeps leaks in and helps neutralise odours.
- Outer layer: waterproof and antibacterial, so you do not get that wet feeling.

Day and night
Up to 12 hours of protection
Depending on your flow, you can wear one pair for up to 12 hours: through a work day or a full night. It is made for heavy flow and holds up to the equivalent of 8 tampons.
It does not feel wet, because the layers take in the moisture, and the antibacterial layer helps keep odours away.
Find your size
| Size | UK size | Waist | Hips |
|---|---|---|---|
| XS | 4–6 | 64–69 cm (25–27 in) | 84–89 cm (33–35 in) |
| S | 6–8 | 69–74 cm (27–29 in) | 91–97 cm (36–38 in) |
| M | 8–10 | 74–79 cm (29–31 in) | 97–102 cm (38–40 in) |
| L | 10–12 | 79–86 cm (31–34 in) | 104–109 cm (41–43 in) |
| XL | 12–14 | 86–91 cm (34–36 in) | 109–114 cm (43–45 in) |
| 2XL | 14–16 | 91–97 cm (36–38 in) | 114–119 cm (45–47 in) |
| 3XL | 16–18 | 99–102 cm (39–40 in) | 122–127 cm (48–50 in) |
| 4XL | 18–20 | 104–109 cm (41–43 in) | 127–132 cm (50–52 in) |
| 5XL | 20–22 | 112–117 cm (44–46 in) | 135–140 cm (53–55 in) |
| 6XL | 22–24 | 117–122 cm (46–48 in) | 140–145 cm (55–57 in) |
Most women find the briefs true to size, so you can usually keep your normal size. If you are between two sizes, choose the larger one. The model is 180 cm (5 ft 11 in) tall and wears size 2XL.
Care
How to wash them
1. Rinse
Rinse the underwear in cold water after wearing.
2. Machine wash
Wash at 30 °C with a mild detergent, ideally in a laundry bag.
3. Hang to dry
Let it air-dry. Do not use bleach or fabric softener.

Why switch
Less waste, more comfort
Because the briefs are washable and reusable, they replace a pile of disposable pads and tampons. For a full rotation, plan one pair for the day and one for the night, and at least 4 pairs in total, so you always have a clean pair ready while the others are in the wash.

Black

Leopard

Pink
Questions people ask
Is it hygienic?
Yes. A special antibacterial layer helps eliminate bacteria and neutralise odours, keeping the underwear fresh while you wear it.
How long can I wear one pair?
Up to 12 hours, depending on how heavy your flow is.
Won't it smell?
The antibacterial layer helps remove unwanted odours, so it stays fresh through the day.
Doesn't it feel wet?
No. The 4-layer build absorbs the moisture, so it does not feel wet against your skin.
Does it feel bulky?
Most women do not notice it. Only the absorbent area has extra layers, making that part slightly thicker, but not in an uncomfortable or visible way.
How many pairs do I need?
One for the day and one for the night, and at least 4 pairs so there is always a clean one while the others are washed.
Specifications
- Absorbency: heavy flow, up to the equivalent of 8 tampons
- Wear time: up to 12 hours, depending on flow
- Construction: 4 layers: comfort, absorbent, moisture barrier, waterproof antibacterial outer layer
- Care: machine wash at 30 °C, air-dry, no bleach or fabric softener
- Colours: black, leopard or pink
- Sizes: XS to 6XL (UK 4 to 24)
What's in the box
- 1 × period brief in your chosen size and colour