[{"id":261236129867,"handle":"best-sellers","updated_at":"2022-05-19T18:20:58+01:00","published_at":"2021-05-20T15:17:10+01:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Best Sellers","body_html":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch2\u003e\u003cspan style=\"color: #8b072f;\"\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eShop our best-selling period pants for a leak-free comfy period.\u003c\/span\u003e\n\u003c\/div\u003e"},{"id":261378211915,"handle":"best-selling-collection","title":"Best selling products","updated_at":"2022-05-19T18:20:58+01:00","body_html":null,"published_at":"2021-06-04T13:53:54+01:00","sort_order":"best-selling","template_suffix":null,"disjunctive":false,"rules":[{"column":"variant_price","relation":"greater_than","condition":"0"}],"published_scope":"web"},{"id":261221580875,"handle":"bikini-style-period-pants","updated_at":"2022-05-19T11:50:12+01:00","published_at":"2021-05-18T13:24:23+01:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Bikini Style Period Pants","body_html":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"color: #8b072f;\" data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/h2\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-fragment=\"1\" data-mce-style=\"font-weight: 400;\"\u003eWhy Choose Our Bikini Style Period Pants?\u003c\/span\u003e\u003c\/h2\u003e\nLeak-proof period panties in a classic, comfy Bikini fit. \u003c\/div\u003e"},{"id":261216567371,"handle":"classic-period-pants","updated_at":"2022-05-19T11:50:12+01:00","published_at":"2021-05-17T19:50:13+01:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"FLUX Classic™️ Period Pants","body_html":"\u003cmeta charset=\"utf-8\"\u003e\n\u003cdiv class=\"Polaris-Layout__Section_1b1h1\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"Polaris-Card_yis1o\" data-mce-fragment=\"1\"\u003e\n\u003cdiv class=\"Polaris-Card__Section_1b1h1\" data-mce-fragment=\"1\"\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003ch2 style=\"text-align: center;\" data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\" data-mce-fragment=\"1\"\u003eWhy Choose Our Classic Period Pants?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003cspan style=\"color: #8b072f;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003eOur classic period pants are made using super-soft and sustainable luxurious feeling TENCEL\u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e™\u003c\/span\u003e Modal fabric that is kind to your body and the planet. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e"},{"id":260527554635,"handle":"heavy-flow","updated_at":"2022-05-19T11:50:08+01:00","published_at":"2021-03-05T16:13:26+00:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Heavy Flow Period Pants","body_html":"\u003ch2 style=\"text-align: center;\" data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\" data-mce-fragment=\"1\"\u003eWhy Choose Our Heavy Flow Period Pants?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: #8b072f;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003eOur heavy flow period pants are a complete replacement for disposable pads and tampons. If you're looking for period underwear that keeps you fresh, dry and completely leak-free, look no further. Our knickers absorb up to four tampons' worth of blood for up to 12 hours. Simply wear, wash, reuse.\u003c\/p\u003e","image":{"created_at":"2021-03-08T17:20:28+00:00","alt":null,"width":76,"height":69,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0072\/6184\/7610\/collections\/1615224027_1614988016_plad2.png?v=1615224029"}},{"id":260527456331,"handle":"newest-products","title":"New Arrivals","updated_at":"2022-05-19T18:20:58+01:00","body_html":"","published_at":"2021-03-05T16:00:51+00:00","sort_order":"created-desc","template_suffix":"","disjunctive":true,"rules":[{"column":"title","relation":"contains","condition":"Newest"},{"column":"title","relation":"not_contains","condition":"Newest"},{"column":"title","relation":"not_contains","condition":"Mix \u0026 Match"}],"published_scope":"web"},{"id":261378179147,"handle":"new-collection","title":"New products","updated_at":"2022-05-19T18:20:58+01:00","body_html":null,"published_at":"2021-06-04T13:53:53+01:00","sort_order":"created-desc","template_suffix":null,"disjunctive":false,"rules":[{"column":"variant_price","relation":"greater_than","condition":"0"}],"published_scope":"web"},{"id":261221908555,"handle":"curvy-period-pants","updated_at":"2022-05-19T11:50:08+01:00","published_at":"2021-05-18T13:43:21+01:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Plus Size Period Pants","body_html":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\n\u003cspan style=\"color: #8b072f;\" data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-fragment=\"1\" data-mce-style=\"font-weight: 400;\"\u003eYou’ll never have to worry about your more delicate days again with this collection‒ in any size! Check out our plus size period pants right here and find the pairs that’ll leave you feeling fresh and fabulous every time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cbr data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-fragment=\"1\" data-mce-style=\"font-weight: 400;\"\u003eHolding up to four tampons’ worth of flow and available in size 18, 22, 24, and 30, these knickers have been designed and made with your comfort in mind. Each super soft pair is quick-drying and will sit against your skin just right. They even make use of a stretchy waist to keep you snug and secure when you need it most!\u003c\/span\u003e\u003c\/p\u003e\n\u003cbr data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-fragment=\"1\" data-mce-style=\"font-weight: 400;\"\u003eWhether you’ve got a big night out coming that you don’t want to miss, or your only plans for the week are staying curled up with some snacks and your favourite series, we’ve got the underwear to keep you covered. We can even have them delivered anywhere in the UK on a next day service , so they’ll be ready to go by the time your cycle starts again.\u003c\/span\u003e\u003c\/p\u003e\n\u003cbr data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-fragment=\"1\" data-mce-style=\"font-weight: 400;\"\u003eFeel clean and confident in your body every day of the month with our plus size period pants. Pick out the pairs you love the most from our selection and make a permanent change to your menstrual products today.\u003c\/span\u003e\u003c\/p\u003e\n\u003cbr\u003e\n\u003c\/div\u003e"},{"id":261221711947,"handle":"period-pants","updated_at":"2022-05-19T18:20:58+01:00","published_at":"2021-05-18T13:39:44+01:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Shop All Period Pants","body_html":"\u003ch2 style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003ePeriod Pants: Why Choose FLUX Undies?\u003c\/h2\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eWhen you choose to buy period pants from FLUX Undies, you won’t just be getting a new set of super comfy underwear to slip into whenever you feel your period coming. You’ll be getting a sustainably made, environmentally-friendly purchase that’ll even save you money in the long run. One pair of our period-proof panties is designed to be worn for up to 12 hours a day and will last for up to three years, so think of how much you’ll be giving back, both to your budget and to the world.\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eNot only will you be reducing your waste by as much as 99.5%, but you’ll also be getting involved in our donation scheme ‒ for every pair you buy, we’ll provide a reusable period pad for a girl who needs one. We also believe in empowering the people who work with us, as well as our customers, so you can feel confident knowing your favourite pairs of period panties have come from factories with ethical working practices. Change your life, every month. \u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eWe know that making the switch can be difficult at first, which is why we’d suggest trying your new period panties out at home before replacing your current products completely. You could be changing your life with a new set of super absorbent, fully washable period undies made by us, so why not take a look at the styles we offer and see what you think? Buy a pair or two to get you started and pass the days of your period in clean, comfortable, and completely sustainable style! Delivery across the UK and worldwide.\u003c\/div\u003e"},{"id":261259952203,"handle":"vegan-period-pants","updated_at":"2022-05-19T18:20:58+01:00","published_at":"2021-05-22T17:56:15+01:00","sort_order":"best-selling","template_suffix":"","published_scope":"web","title":"Vegan Period Pants","body_html":"\u003cdiv class=\"Polaris-Layout__Section_1b1h1\" data-mce-fragment=\"1\"\u003e\n\u003ch2 style=\"text-align: center;\" data-mce-fragment=\"1\"\u003e\u003cspan style=\"font-weight: 400;\" data-mce-fragment=\"1\" data-mce-style=\"font-weight: 400;\"\u003eWhy Choose Our Vegan Period Pants?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp style=\"text-align: center;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: center;\"\u003eEvery pair of our period underwear is 100% vegan and cruelty-free. We source natural and sustainable materials for our period pants and never use animal products or test on animals. Shop now for a leak-free and cruelty-free period.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e"}]
Our Classic best-selling Bikini period underwear combines style with function. Holding up to four tampons' worth, they are a dream to wear day and night and can be worn leak-free for up to 12 hours.
For Periods, Leaks and Incontinence
Holds Four Tampons' Worth / 20-25ml
Wear For Up To 12 Hours Leak-Free
Soft, Stretchy and Comfortable
Lightweight and Quick-drying
OEKO-Tex Certified Materials
Free From Toxins, Chemicals and PFAS/PFOA
Materials: Body: 95% TENCEL Modal 5% Elastane Gusset: Absorbent Blend, Breathable PUL Packaging: 100% Recycled and Recyclable Cardboard
🍃 Bleed Green: Each pair of our period pants replace 200+ disposables from going to landfill, reducing your waste by 99.5%
🤝 Giving Back: For every purchase, we give back to someone in need. Find out more about our #ByYouForThem giving back scheme here
We offer free shipping on all UK orders and free tracked shipping on International orders over £75.
For same-day dispatch and next day delivery, please place your order before 1pm.
All orders are dispatched from our UK warehouse using trusted couriers such as Royal Mail, DHL and DPD.
Delivery options
UK
DPD Next Day Delivery Service
Next day service, shipped by DPD tracked, £6.95
Royal Mail 1st Class Delivery Service
1-2 days, shipped by Royal Mail tracked, £4.95
FREE Standard Shipping Service
2-3 days, shipped by Royal Mail untracked
EU
*Free standard shipping is offered on all EU orders above £75
Express Tracked Shipping Service
1-2 days, tracked and signed, £14.95
Tracked Shipping Service under £75
3-5 days, tracked, £9.95
FREE Tracked Shipping Service under £75
3-5 days, tracked
USA & Canada
*Free standard shipping is offered on all International orders above £75
Express Tracked Shipping Service
1-3 days, tracked and signed, £19.95
Tracked Shipping Service for orders under £75
5-7 days, tracked, £11.95
FREE Tracked Shipping Service for orders over £75
5-7 days, tracked
Rest of world
*Free standard shipping is offered on all International orders above £75
Express Tracked Shipping Service
1-4 days, tracked and signed, £19.95
Tracked Shipping Service for orders under £75
5-7 days, tracked, £14.95
FREE Tracked Shipping Service for orders over £75
5-7 days, tracked
Think our period pants sound too good to be true? Take them on a risk-free trial for 60 days!
If our undies don't work as promised, let us know within 60 days and we'll refund you, no questions asked. The 60-day risk free trial applies to one worn pair of undies only. Refunds will be paid to the original payment method that was used to place the order.
🚿 Rinse after use.
🧽 Machine wash on 30-40 degrees.
🍃Hang to dry or dry indoors on a radiator.
⚠️ Do not use fabric softener or bleach. No tumble drying.
And that's it! Your FLUX Undies are ready to wear again!
Our Period Pants Are:
Sustainably Manufactured
We only use eco-friendly materials that are sustainably manufactured
Vegan and Cruelty-Free
Made from natural materials and never with animal materials or testing
Free From Nasties
Certified safe for skin and free from toxins, chemicals and fragrances.
60-Day Money Back Guarantee60-Day Money Back Guarantee60-Day Money Back Guarantee60-Day Money Back Guarantee
How They Work
Our period pants absorb up to 5 tampons' worth of liquid, yet they look and feel just like regular undies.
Our built-in tech works like this:
1. Top layer wicks moisture away from the surface quickly, to keep you dry
2. Our middle layers absorb your blood and lock in your flow
3. The bottom layer pushes liquid back up and keeps you leak-free
Absolutely loved wearing these - so comfy and I recommend. It takes a bit of getting used to not wondering if you’re leaking but I didn’t and felt good for half the day then I changed. If I had the money I’d only wear these on my period - have the medium flow as well and also love.
Never tried these before so was a little nervous but they worked fantastically. No leaks, felt really comfy on, wore for around 8 hours with a heavy period and have now purchased two others! Will definitely be recommending
K
Katie Reid
Flow:Heavy
Products used:FLUX Undies, obvs!
Game changer
These are honestly amazing. I have very heavy periods for my first few days and ordered the heavy flow pants. I wore them for 8 hours without any leaks. They are so comfy and I never want to go back to pads again.
Thank you for a great product.
J
JA (Manchester, GB)
Flow:Moderate
Products used:FLUX Undies, obvs!, Tampons
So impressed!
I must say I was very sceptical but thought I’d give them a try. Wow what a game changer! I feel secure, dry, comfortable. Just bought 2 more pairs!
