Excellent
CoreSlim™ | Corrective slimming underpants | 5+5 FREE
CoreSlim™ | Corrective slimming underpants | 5+5 FREE
Free Worldwide Shipping
Easy Returns Within 30 Days
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CoreSlim™ | Corrective slimming underpants | 5+5 FREE
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Honestly impressed with the quality and the fast delivery.
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Fits perfectly and the customer service was really helpful too.
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Great product and smooth ordering experience from start to finish.
SPECIFICATION
SPECIFICATION
Material: Nylon and spandex
Crotch: 100% Cotton
Waist Type: High Waist
Color: Black, Green, Peach, Pink, Dark Green
Function: Seamless, antibacterial, Hip lift, slimming, pain relief
Package Contains: CoreSlim™ 5+5 or 10+10 FREE
SHIPPING INFORMATION
SHIPPING INFORMATION
Customer satisfaction is our top priority. That's why you'll always be kept informed about your order, and we always ensure free shipping!
14 DAY EASY RETURNS
14 DAY EASY RETURNS
We offer a 14-day returns policy if you're not satisfied with your order for any reason. For more information, see our Returns Policy
Get rid of back pain and visible belly fat!
CoreSlim™ offers optimal comfort and targeted support for women who want to slim their stomach and create a tighter waistline. Made from high quality materials such as nylon and spandex, with a 100% cotton gusset for maximum hygiene and breathability.
Invisible smoothing underwear that perfects your natural shape
Waist Shaping
Visibly slims the waistline and smooths belly fat.
Back Support
Provides powerful back support that improves posture
100% Cotton Crotch
Visibly slims the waistline and smooths belly fat.
Sustainable Fabric
Made with durable, high-quality fabric
CoreSlim™ underwear offers countless benefits!
These stylish CoreSlim™ underwear are seamless and skin friendly. They are designed to elongate the waist, tighten the stomach, and relieve back pain.
Real Shaping. Real Confidence.
Feel slimmer and confident from morning to night.
Why Women Love CoreSlim™ ? 🥰
95%
Improved posture: CoreSlim™ provides excellent support. The product reduces visible folds in the waist and back, lifts the buttocks, and firms both the abdomen and back.
100%
100% cotton Crotch: The gusset is made of 100% cotton, which provides extra comfort and breathability, essential for preventing irritation and allergies.
95%
Wide waistband with anti cellulite effect: The wide waistband is made of ultra soft material. It camouflages cellulite, supports the tightening of belly fat, and refines the waist.
Chosen by 18,000+ women — loved for all day support.
1 days ago
Perfect Match
This product surpassed all my expectations! The quality is outstanding, and it’s exactly what I needed. I couldn’t ask for more—absolutely perfect!
Olivia Smith
2 days ago
Fast Process
The process was so simple and efficient. My order arrived faster than I anticipated, and the product is fantastic. A hassle-free and enjoyable experience!
Ava Brown
5 days ago
Quick Delivery
I was amazed by how quickly my order arrived! The product itself is flawless and just as described. Couldn’t be happier with the service and quality.
Sophia Miller
2 days ago
Outstanding Quality
From start to finish, the experience was fantastic. The product quality is superb, and the attention to detail is impressive. Will definitely shop here again!
Amelia Wilson
Your Questions, Our Promise.
How do I choose the right size?
How do I choose the right size?
We recommend checking the size chart on the product page before ordering. If you’re between two sizes, we suggest selecting the larger size for the best fit.
Can I wash and reuse Guilly panties?
Can I wash and reuse Guilly panties?
Yes, Guilly shapewear is reusable. Rinse after use and machine wash on a gentle cycle (below 40°C), separately to keep colors vibrant. Avoid fabric softeners, bleach, and dryers to maintain lasting performance.
Does CoreSlim™ focus more on slimming or on comfort?
Does CoreSlim™ focus more on slimming or on comfort?
CoreSlim™ is designed to provide both. The shaping technology flattens the tummy and refines the waistline, while the seamless design and cotton crotch ensure all-day comfort. You don’t have to choose between looking slimmer and feeling good — with CoreSlim™, you get both.
What should I do if I have an issue with my order or product?
What should I do if I have an issue with my order or product?
If you experience any issue, our team is here to help. Simply email us at info@guillyunderwear.com
, and we’ll get back to you within 24 hours.