SlimFitString™ | Slimming Strings | 2+2 Free
SlimFitString™ | Slimming Strings | 2+2 Free
Reliable protection for up to 12 hours
Comfortable with a discreet design
Washable and reusable
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SlimFitString™ | Slimming Strings | 2+2 Free
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Who is Guilly | USA for?
Who is Guilly | USA for?
Guilly | US is ideal for women with the following types of incontinence:
◦ Stress incontinence – leakage when coughing, laughing, lifting or exercising.
◦ Urge incontinence – sudden urge to urinate, often without full control.
◦ Overflow incontinence – small, continuous leaks because the bladder is not completely emptied.
◦ Functional incontinence – urine loss due to physical limitations or difficulty reaching the toilet in time.
Suitable for women with light to moderate incontinence who seek comfort, security, and discretion in everyday life. For more severe incontinence, we recommend combining the briefs with a panty liner or small pad for extra security.
3-layer technology
3-layer technology
Guilly | USA features advanced 3-layer technology in the crotch area, specifically designed to keep women dry, comfortable and confident:
✔️ Layer 1: Moisture-Managing Top Layer
This quick-drying fabric instantly wicks moisture away from the skin and prevents irritation. Antibacterial silver particles help eliminate up to 99% of bacteria — fresh and hygienic all day long.
✔️ Layer 2: Absorbent Core
The powerful core securely locks away moisture and neutralizes odors. Suitable for light to moderate periods of urine loss.
✔️ Layer 3: Leakproof Membrane
A waterproof membrane that prevents leaks without compromising comfort. Stays effective for up to 1500 washes – for worry-free confidence.
Delivery & Returns
Delivery & Returns
Even the best incontinence underwear offers no security if the fit is not right.
That's why SlipSecure gives you a 100% Perfect Fit Guarantee.
We understand that every body is different. Doesn't it fit perfectly? No problem.
👙 Try it on at home. It's not comfortable? Let us know within 30 days – send an email with your order number and your preferred size.
📦 We'll send you a new pair of SlipSecure underwear in the correct size for free. You can keep the original product.
100% perfect fit guarantee
100% perfect fit guarantee
All orders are normally processed and shipped from our warehouse within 1-2 business days. We're now offering free shipping on all orders in the Netherlands and Belgium!
Shipping typically takes 4-8 business days, depending on your location. Every order comes with a Track & Trace code for added peace of mind!
You can return your order within 30 days. Simply email us at info@guillyunderwear.com. Our team is happy to help!
Almost Gone – Don’t Miss Out!
Join 2,000+ women already switching to comfort and confidence. Our best-selling leak-proof panties are nearly sold out. Secure yours today before stock runs out!
The most advanced technology on the market
Comfortable incontinence underwear with maximum protection.
28x
More breathable
2x
More protection
4x
Better odor control
You're just one step away from peace, control, and freedom.
Panty liners every day? They cause discomfort, skin irritation, and unnecessary waste.
With Guilly Leak Proof Underwear you enjoy comfort and maximum protection – without stickiness, shifting or irritation.
8-12 hours of effective protection, wash after wash
Comfortable fit without friction
Seamless and invisible under clothing
Real Protection. Real Confidence.
From morning to night, stay fresh, secure, and worry-free.
Results You Can Feel Every Day.
90%
Advanced 4-layer leak protection keeps you comfortable and confident — no pads, no worries.
90%
Designed to look and feel like regular underwear, with a seamless fit that disappears under clothes.
90%
Reusable, easy-care fabric means less waste, less spending, and eco-friendly peace of mind.
Tested by 2,000+ women — trusted for all-day dryness.
Your Questions, Our Promise.
How do Guilly leak-proof panties work?
How do Guilly leak-proof panties work?
Guilly panties use advanced 4-layer absorbent technology that locks in moisture and prevents leaks for up to 12 hours. They feel just like regular underwear — soft, breathable, and comfortable — while giving you the protection you need.
Can I wash and reuse Guilly panties?
Can I wash and reuse Guilly panties?
Yes! Guilly panties are designed to be reusable. Simply rinse them in cold water after use, then wash them on a gentle cycle. Avoid fabric softeners or bleach to keep them performing at their best.
Are Guilly panties comfortable to wear every day?
Are Guilly panties comfortable to wear every day?
Absolutely. Guilly panties are made with breathable, skin-friendly fabrics that feel like a second skin. They’re discreet, seamless under clothes, and designed for everyday comfort — whether at work, the gym, or while sleeping.
Who are Guilly panties best suited for?
Who are Guilly panties best suited for?
Guilly panties are perfect for women who want reliable protection from light to moderate leaks, whether from periods, postpartum, or light incontinence. They’re a sustainable alternative to pads, liners, and disposable products.