fluxies
Seamless "Bikini" Period Underwear
Seamless "Bikini" Period Underwear
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Size chart
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High Absorbency Fluxies Seamless Period Bikini Briefs — designed to be completely invisible under clothing, providing maximum comfort even on heavier flow days. The fabric is very thin, elastic, and breathable — it fits the body like a second skin, maintaining comfort and discretion. The briefs feature multi-layering: a moisture-wicking layer, an absorbent layer, and a leak-proof protective layer.
🩸 Absorbs up to 28 milliliters (equivalent to 5 tampons).
🌿 Breathable, soft, and elastic fabric.
🧵 Seamless design – invisible under clothes.
🛏️ Suitable for day and night.
♻️ Reusable – washable and durable.
🫧 PFAS-free, OEKO-TEX certified materials.
Made from OEKO-TEX certified, breathable, and harmful-substance-free fabrics – gentle on your body and friendly to nature.
Instructions for use
Instructions for use
Before the first use, we recommend rinsing the panties in cold water until the water runs clear. After rinsing, hang the panties to dry.
The use of menstrual cups or menstrual discs does not interfere with wearing menstrual panties.
We do not recommend wearing sanitary pads with Fluxies menstrual underwear.
Ingredients
Ingredients
Briefs: 95% Tencel modal, 5% elastane;
Gusset: 100% microfiber
transparent thermoplastic polyurethane (TPU).
The gusset is exceptionally moisture-wicking and breathable.
Fluxies underwear contains no added PFAS, and has been successfully tested for harmful substances and certified according to the "OEKO-TEX®️" STANDARD 100.
Care
Care
Rinse the panties until the water runs clear, then it is recommended to wash them in 30˚C water (no higher than 40°C), and hang them to dry.
It is recommended to avoid fabric softener or use a mild one to reduce the possibility of damaging the absorbent layer.
Do not use bleach. Do not tumble dry.
F.A.Q.
F.A.Q.
1. Are fluxies period pants stain resistant?
fluxies period pants are not stain resistant, however, the materials used in fluxies' absorbent gussets are always black to ensure stains are not visible.
For fluxies to be stain resistant, fluxies would need to treat them — these treatments would leave harmful substances and toxins in the impermeable underwear, and fluxies do not want that in their naturally antimicrobial panties.
2. What absorbency do I need?
fluxies period pant models feature various absorbencies – from super light (7ml / 1 tampon) to super heavy (40ml / 5 tampons), so everyone will find a suitable one.
fluxies low absorbency models are perfect for the end of the day and for spotting.
For some people, medium absorbency models can replace tampons or menstrual cups on heavier days.
Heavy and super heavy models replace all other menstrual products and are also great for overnight use!
3. How do I know when it's time to change my period underwear?
A sign that the absorbent layers of your fluxies period underwear are full is the appearance of blood at the seams — this indicates that it is time to change your period pants for a new pair.
More Information
Find more answers to your questions by visiting our Frequently Asked Questions (FAQ) page.
Fluxies is a UK brand known for creating reusable, comfortable, and sustainable period products. The company started as FLUX Undies, becoming one of the first in the UK market to offer reusable period underwear at a time when such solutions were still a novelty. Fluxies period underwear is a reusable, comfortable, and environmentally friendly alternative to traditional hygiene products, aiming to combine comfort, functionality, and an environmentally responsible approach.
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