Period underwear has come a long way — but not all of it is built for the days when you actually need it most. Heavy flow days. Overnight. The moments when a standard pair of period pants simply isn’t enough. The NIXI Body Polly Leakproof Knicker is designed specifically for those moments. Four layers of discreet absorbent gusset holding up to 25ml — the equivalent of 4–5 tampons — in a high-waist, wide-gusset design with pretty lace detailing that doesn’t look or feel like protection. Washable, reusable, and better for the planet. From just £22.00 for a single pair, or £56.00 for a 3-pack (saving £10) and £88.00 for a 5-pack (saving £22).
Why The Polly Is Different
NIXI Body is a British brand built around a simple but powerful idea: that period and bladder leak protection should be comfortable, confident, and genuinely effective — not a compromise. The Polly is their heavy-duty hero, designed for the days when you need maximum protection without sacrificing how you feel.
The four-layer gusset construction is the key. The innermost layer is a soft cotton lining (95% cotton, 5% elastane) that sits comfortably against the skin. The middle absorbent layers (80% polyester, 20% nylon) capture and lock in fluid. The outer layer is a waterproof TPU barrier that prevents any leakage through to clothing. The whole system is encased in a smooth nylon-elastane body (75% nylon, 25% elastane) with pretty lace detailing — so from the outside, it looks like a beautiful pair of high-waist knickers, not a medical garment.
- 🌸 Holds up to 25ml (4–5 tampons) — genuine heavy flow and overnight protection
- 🌸 Four-layer absorbent gusset — cotton lining, absorbent core, waterproof TPU barrier
- 🌸 High waist design — added comfort and security, especially overnight
- 🌸 Wider gusset — extended coverage for heavier flow and bladder leaks
- 🌸 Pretty lace detailing — looks and feels like regular lingerie
- 🌸 Washable & reusable — wash at 30–40°C, air dry, use again
- 🌸 Sizes 8–24 — an inclusive size range for all body types
- 🌸 Can replace or supplement pads and tampons — flexible protection for any situation
When to Wear Them – Usage Cases & Situations
🌙 Overnight & Heavy Flow Days
The Polly was designed with overnight protection in mind. The high waist provides security in every sleeping position, the wider gusset extends coverage front to back, and the 25ml absorbency means you can sleep through the night without anxiety about leaks — even on your heaviest days. Many users find The Polly completely replaces overnight pads, eliminating the discomfort of adhesive pads and the environmental waste of single-use products. Wake up feeling comfortable and confident, not anxious.
🏋️ Exercise & Active Days
Exercise during your period — or with bladder leak concerns — can feel like a logistical challenge. The Polly’s waterproof TPU layer and secure fit mean you can run, do yoga, go to the gym, or take a spin class without worrying about leaks or discomfort. The nylon-elastane body moves with you, the absorbent gusset handles sweat as well as period flow, and the high waist stays in place during dynamic movement. Wear alone or alongside a tampon or cup for complete confidence during intense exercise.
💼 Long Days & Travel
Long days at work, travel days, or any situation where access to bathroom facilities is limited or inconvenient are exactly where The Polly earns its place. The 25ml absorbency provides a meaningful buffer — enough to get through a long meeting, a flight, or a day of sightseeing without constant anxiety about leaks. Wear alongside a tampon on your heaviest days for belt-and-braces protection, or alone on lighter days for a completely pad-free experience.
🧘 Perimenopause & Bladder Leak Support
Bladder leaks — from sneezing, laughing, coughing, or exercise — affect millions of women, particularly during perimenopause and beyond. The Polly’s wide absorbent gusset and waterproof barrier provide discreet, comfortable protection for light to moderate bladder leaks, without the bulk or discomfort of incontinence pads. The high waist and lace detailing mean it looks and feels like regular underwear — because confidence matters as much as protection.
🌍 The Sustainable Switch
The average person uses approximately 11,000 disposable period products in their lifetime — most of which end up in landfill. Switching to reusable period underwear like The Polly is one of the most impactful sustainable choices a person can make. Each pair replaces hundreds of single-use pads or tampons over its lifetime, and the environmental saving compounds with every wash cycle. The Polly is washable at 30–40°C and air-dries — a simple, low-impact care routine that makes the sustainable choice genuinely easy.
Outstanding Value – Single, 3-Pack & 5-Pack Options
Premium period underwear from brands like Modibodi, Thinx, and Wuka typically retails at £25–40 per pair for heavy absorbency. The NIXI Body Polly delivers comparable or superior absorbency (25ml, 4–5 tampons) at just £22.00 per pair — and the multi-pack options make the value even more compelling:
- 🌸 Single pair – £22.00
- 🌸 3-Pack – £56.00 (was £66.00 — saving £10, effectively one pair free)
- 🌸 5-Pack – £88.00 (was £110.00 — saving £22, over one pair free)
When you factor in the lifetime cost of disposable period products — the average person spends £130–£150 per year on pads and tampons — a 5-pack of Pollys at £88 pays for itself in under a year and continues saving money (and plastic) for years afterwards. Available in sizes 8–24, true to size.
🌸 Shop NIXI Body The Polly – From £22 | 3-Pack £56 | 5-Pack £88
In stock now in sizes 8–24. Single, 3-pack and 5-pack options available. The leakproof knicker built for your heaviest days — order yours today.
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