Guide

Most sport period underwear returns trace back to two pattern decisions made before a single unit ever ships: gusset coverage that's mismatched to how the body actually moves, and a size grading logic borrowed from regular underwear that doesn't hold up once you're scaling a leakproof panel across X

Sweat, odor, and chafing aren't three separate complaints about sport period underwear — they're one problem wearing three different faces. Sweat and menstrual fluid landing on the same layer make that layer feel wetter and take longer to dry; that trapped moisture is exactly what makes odor more no

If you're sourcing period-proof running shorts, ask every factory — us included — for four specific things: the exact absorbency test method behind any "XXml" number, dynamic leak testing under running/squat/jump motion, post-wash performance data at multiple wash cycles, and finished-garment chemic

Leak proof underwear is underwear with a built-in absorbent layer sewn into the gusset — it looks, fits, and washes like a regular pair of underwear, and its only extra job is catching light leaks before they reach your clothes. That's the whole concept. No tubes, no adhesive strips, no bulky shape

The right protection level comes down to one number — the absorbency capacity in milliliters — and matching that number to how much backup you actually need on a given day: light is up to 100ml, moderate is 100-150ml, and heavy is 150-200ml or more, or a diaper-cover style for the highest end. That'

Whether your brand should develop a private label period running short depends on four things — whether you already have a period-underwear customer base, whether you can accept 6-8+ weeks of development time, whether you're comfortable telling customers the category-wide testing gaps honestly, and

Yes, you can run in period underwear — the real question isn't whether it's possible, it's whether the specific pair you're wearing was actually built for running or just happens to be underwear you could technically run in.I got asked this in a way I wasn't expecting a couple months ago. One of our

30ml is a capacity target, not a wear-time promise — how long any period running short actually lasts on your body depends on your flow and how hard you're training, not on the number printed in a spec sheet.I want to get that out of the way in the first line because it's the single most common misu