Seamless Hi-Waist

Pack Size

Our Seamless Hi-Waist period pants are ultra-thin, super smooth, and truly invisible. Designed with soft, lightweight nylon, they are super stretchy, and comfortable and can be worn seamlessly under anything. The breathable fabric keeps things nice and cool, and of course, our signature built-in tech absorbs moisture and prevents leaks, holding up to 4 tampons, for up to 12 hours.

Fit true to size. Due to the high elastane content, they can feel a little tight upon first use, however, they will loosen slightly after the first few wears.

  • Soft, Stretchy, and Seamless
  • Lightweight and Super quick-drying
  • OEKO-Tex Certified Materials
    Next day delivery available
    Easy returns within 60 days
    Free shipping on UK orders over £30!

    Our period-proof underwear combines cutting-edge technology with ultimate comfort. Here’s how it works:

    Multi-Layer Protection: Our underwear features a unique multi-layer system designed to keep you dry and comfortable all day.

    1. Moisture-Wicking Layer: Quickly draws moisture away from your body to keep you feeling fresh.
    2. Absorbent Core: Locks in fluid, providing reliable protection against leaks.
    3. Leak-Resistant Barrier: Prevents any leaks, so you can move with confidence.
    4. Breathable Fabric: Ensures airflow to keep you cool and dry.

    Machine wash max 40°C with mild detergent, hang to dry. No bleach. No tumble dry.

    BODY: 95% Organic Cotton, 5% Elastane
    GUSSET LINING: 95% Organic Cotton, 5% Elastane
    GUSSET:100% Microfibre, Biodegradable TPU

    Our underwear has no added PFAS, and has been successfully tested for harmful substances and certified according to STANDARD 100 by OEKO-TEX®️.

    Learn more about how to care for period underwear.

    UK Bound? Lucky You!

    Enjoy free shipping on us, on all UK order over £30! Need it quick? Pick next day delivery at checkout.

    Order before 12:00 pm GMT on a working day (that’s Monday to Friday), and we’ll send out your goodies on the same day. Talk about speedy service!

    Not in the UK?

    No worries! We’ve got free worldwide shipping on orders over £75. Plus, you can speed things up with express shipping options at checkout.

    Returns Made Easy

    Didn’t hit the jackpot with your purchase? No sweat! We’ve got your back with hassle-free returns and exchanges for 30 days. And if our products don’t live up to the hype (spoiler: they totally will!), we’ll refund you within 60 days*. Yep, we’re that confident! 🚚✨

    * Try fluxies risk-free on your first order. If our undies don't work as promised, let us know within 60 days and we'll refund you. The 60-day risk-free trial applies to one worn pair of undies only.

    close up of fluxies boyshort period pants

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    Tried and tested by over 200,000 people worldwide


    Breathable and super-soft

    Experience ultimate comfort with our breathable, ultra-soft fabrics.


    Reusable and washable

    Wear, wash, and reuse for many years to come.


    Natural all day odour-control

    Stay fresh all day with our odour-neutralising fabrics.


    Facts behind the fabrics

    Our Seamless period underwear is made using recycled nylon, made from pre consumer waste — like old water bottles and fishing nets.

    So, you'll be diverting waste from landfill, while wearing light-weight, quick-drying, and super-smooth undies. Win-win!

    Your questions, answered.

    Comfort, uncompromised.