Floena Leakproof Seamless High Waist Brief — black seamless high-waisted period underwear
40-50 mlPFAS-free
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Leakproof Seamless High Waist Brief

★★★★★★★★★★ 4.78 · 88 reviews

Heavy days & nights

€34,99incl. VAT, plus shipping
Absorbency roughly 10 tampons (1 tampon ≈ 5 ml)
40-50 ml on a scale up to 50 ml — the highest absorbency in the range
Colour: Black
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Free shipping over €90 · 90-day comfort guarantee

90-day comfort guarantee — first opened item exchanged for store credit.

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Seamless comfort for reliable all-day and overnight protection.

Why You'll Love It...

Because feeling secure should never mean feeling bulky. This seamless high-waist period brief gives you invisible, all-day comfort with powerful leakproof protection that absorbs up to 5 regular tampons’ worth of flow. The smooth, second-skin period underwear fabric stretches gently with your body, offering freedom and softness you can truly trust, day or night. With its wide absorbent core and leakproof side panels, you’ll feel confident, fresh, and completely at ease, no matter where the day takes you.

Fabric and composition
  • Lining Layer: 95% Cotton + 5% Spandex – soft, breathable, and gentle against your skin.
  • Middle Layer: 80% Polyester + 20% Nylon/Breathable TPU – highly absorbent and discreet.
  • Outer Layer: 80% Nylon + 20% Spandex – seamless, smooth, and supportive with a second-skin feel.

All fabrics are tested for harmful substances and PFAS-free, for worry-free all-day wear.

Fit and feel

High-rise waist with full, smoothing coverage. Seamless edges prevent lines or irritation. Has a slightly snug fit — if you’re between sizes, we recommend sizing up. The flexible stretch moves naturally with your body, offering a smooth, second-skin feel.

Size chart
SizeWaist cmHip cm
XS60-6784-91
S67-7491-98
M74-8198-105
L81-88105-112
XL88-98112-119
XXL98-108119-126
Care and lifespan

Rinse in cold water after use. Machine wash cold, gentle cycle. Do not use fabric softener or bleach. Air dry only.

90-day comfort guarantee

Try your first pair risk-free for 90 days. You can exchange your first opened pair within 90 days for store credit. Unopened items are eligible for a full refund in accordance with our return policy. For the best experience, we recommend trying one pair first to make sure you love the fit and feel. Full terms & conditions apply – please review them here.

Read the full guarantee terms →

Shipping and returns
  • Shipping within the EU: €4.99, free over €90
  • 90-day comfort guarantee
  • Unopened items follow the standard return policy
  • 14-day right of withdrawal for EU consumers
  • Shipped by Eko Flow d.o.o., Brodarjev trg 11, 1000 Ljubljana
Leakproof Seamless High Waist Brief €34,99
How it works

Three layers, one job.

The construction is the same in underwear and swimwear. Only the outer fabric differs — in swimwear it is also water-repellent and carries UPF 50+ sun protection.

1

Inner layer

The smooth layer against your skin moves moisture straight through, so nothing feels wet.

2

Absorbent core

Breathable PUL or TPU takes up the fluid, locks it in and prevents odour.

3

Outer layer

The waterproof layer holds everything back. In swimwear it also repels pool and sea water.

Reviews

What customers say

4.76
★★★★★★★★★★

Overall rating · based on 1262 reviews across 15 products

Highest-rated products

Leakproof Comfort Brief 5.00 · 65
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Floena Ring Cup 4.85 · 20
Floena Menstrual Cup 4.81 · 48
Leakproof Seamless High Waist Brief 4.78 · 88

Frequently asked

How long can I wear one pair?

It depends on flow and style. As a guide: a style with 20–30 ml lasts six to eight hours on a medium day; one with 40–50 ml can last a full night.

Do they show under tight clothing?

The seamless high-waist brief leaves no lines. Ribbed and lace styles can be slightly visible under very thin fabrics.

How do I wash them?

Rinse cold, machine wash cold on a gentle cycle, no fabric softener or bleach, air-dry.

How long do they last?

Around two years with care per the instructions.

Goes well with