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Leakproof Protection
No leaks. Just comfort.
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60-Day Risk-Free
Try it. No pressure.
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Clean ingredients
Gentle. Safe. Skin-kind.
Leakproof boyleg period undies
– Soft, secure, and absorb up to 4 tampons’ worth
Discreet wet bag –
Privacy-friendly for school bags or lockers
Biodegradable wipes –
Freshen up on the go, wherever they are
Heat patch – Hidden under
uniforms, soothing cramps without a fuss
Period tracker stickers –
Helps build confidence and routine
Laundry bag – For used
undies, no plastic needed
Boyleg Cotton Period Undies
Full coverage. Total comfort. Leakproof confidence.
Fanzy Pantz Leak Proof Underwear is designed to keep tweens and teens dry, odour-free, and comfortable throughout their period—whether they're at school, on the go, or getting a good night’s sleep.
Each pair features a specially engineered multi-layer gusset that holds up to 4 regular tampons' worth of flow. It’s discreet, breathable, and built to move with them—so they feel secure, not bulky.
The Layered Protection System:
– Keeps them dry by quickly pulling liquid away from the surface
– Absorbs moisture fast, holding it safely in place
– Breathable and waterproof to prevent leaks and keep them comfy
The boyleg cut offers full back coverage, making it ideal for overnight wear or anytime they want extra protection and peace of mind.
Made from a soft organic cotton blend, these undies are washable, reusable, and planet-friendly—no pads, no plastic, no panic.
Find Their Perfect Fit
Fanzy Pantz period undies are made for growing bodies — soft, comfy, and secure, with full coverage for day and night. If they’re in between sizes, we recommend sizing up for a little extra comfort.
Size Breakdown
XS
Kids AU 12 = Women’s AU 6
Waist: 60–65 cm
Hips: 80–85 cm
Best for: Tweens starting out
S
Kids AU 14 = Women’s AU 8
Waist: 65–70 cm
Hips: 85–90 cm
Best for: Tweens / Teens
M
Kids AU 16 = Women’s AU 10
Waist: 70–75 cm
Hips: 90–95 cm
Best for: Teens
L
Kids AU 18 = Women’s AU 12
Waist: 75–80 cm
Hips: 95–100 cm
Best for: Teens / Young Adults
XL
Kids AU 20 = Women’s AU 14
Waist: 80–85 cm
Hips: 100–105 cm
Best for: Adults
XXL
Kids AU 22 = Women’s AU 16
Waist: 85–90 cm
Hips: 105–110 cm
Best for: Adults
Need help picking a size?
We’re always happy to help—just reach out!
Fanzy Pantz are made to be reused, loved, and worn again and
again. Caring for them is simple:
Rinse in cold water after wearing, until the water runs clear.
Machine wash on cold in the included laundry bag with similar colours.
Skip the fabric softener or bleach — it can affect absorbency.
Air dry flat (not in the dryer) to keep the layers performing their best.
💡 Tip: Have a second pair ready to rotate while one is washing and drying.
How to Use the Kit
4 Easy Steps

1. Pack it
Pick their size, show them what’s inside, and pop it in their school or sleepover bag.

2. Take it
When their period starts, they can take the bag into the toilet—private, discreet, and ready.

3. Use it
Wipe clean, change the undies, pop the used ones in the laundry bag, and use the heat patch.

4. Restock & Track It
Wash the undies, refill the bag, and use the stickers to track their cycle so they’re always prepared.