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The YIANNA Women's Underbust Latex Waist Trainer combines durable 100% latex with soft nylon-spandex lining and 9 or 25 spiral steel boning to provide high compression, posture support, and thermal activity boost. Designed for instant waist reduction of 3-5 inches, it’s perfect for fitness, postpartum recovery, and everyday wear, offering adjustable sizing and breathable comfort for millennial professionals seeking a sleek, confident silhouette.
















| ASIN | B0101BQW5Y |
| Age Range Description | Adult |
| Apparel Closure Type | Hook and Eye |
| Apparel Fabric Stretch | High Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Best Sellers Rank | #4,166 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7 in Women's Shapewear Waist Cinchers |
| Brand Name | YIANNA |
| Care instructions | Hand Wash Only |
| Color | Black |
| Customer Reviews | 4.1 out of 5 stars 59,270 Reviews |
| Fabric Type | Latex |
| Fabric type | Latex |
| Fit Type | slim |
| Fit to Size Sentiment | tight |
| Garment Size Country | United States |
| Import Designation | Imported |
| Item Dimensions L x W | 35.5"L x 11.5"W |
| Item Type Name | Waist Shapewear |
| Manufacturer Part Number | YA-U37G-Black-XL |
| Material Type | Nylon, Latex, Spandex |
| Number of Items | 1 |
| Origin | Imported |
| Product Benefits | Waist Reduction |
| Product Care Instructions | Hand Wash Only |
| Size | X-Large |
| Style Number | YA-U37G-Black-XL |
| Target Use Body Part | Whole Body |
| Unit Count | 1 Count |
E**A
I like it
I measured my waist in the middle of the day, when I'm at my most bloated. I was at 36.5in so I got the XXL. The two largest hooks were a bit loose but the smallest fits just right. It is tight yet comfortable. I wear it for 8 hours a day, it gets uncomfortable at hour 7 but I can power through. I wash it 2-3 times a week and let it air dry overnight. It's dry and ready to use in the morning. It is a little bulky and is pretty noticeable. I'll likely switch to the breathable latex when I downsize since it does get a little hot sometimes. Overall it is comfortable, has helped a lot with back pain, and it has helped a lot with my posture even when I am not wearing it.
C**A
Great quality
I love it. Size Chart im supposed to be XL but it was too big for me, so I returned and got a L instead and looks and works amazing
C**T
Read the review in full
I’m 205 lbs, 5’6”, and I ordered a medium after carefully checking the size chart. Let me start by saying: this thing is NO joke. Getting it on the first time was a whole workout by itself. I’m on the first row of hooks, and yes — it was a challenge to get it closed, but once it was on, it felt secure and structured without being unbearable. I didn’t buy this to wear under clothes. I’m using it strictly as a shaper/training tool, wearing it 1 hour on, 1 hour off from 7 AM to 7 PM. For that purpose, it’s doing exactly what I wanted. The compression is strong, the latex feels durable, and the steel boning keeps everything in place. I’m bottom‑heavy, so it does roll a bit in the back, especially when I sit or bend — but honestly, it’s not enough to bother me or make me stop using it. It still gives me a smooth, cinched look and great support. Pros: • Strong compression • High‑quality latex • Hooks feel secure • Great shaping effect • Perfect for structured wear/training sessions Cons: • Tough to get on at first • Rolls slightly in the back if you’re bottom‑heavy Overall, if you’re looking for a serious waist trainer and you’re willing to put in the effort to get it on, this one delivers. I’m happy with my purchase and the results so far.
R**A
One of the best waist trainers I’ve owned
This is honestly one of the best waist trainers I’ve owned. It gives me firm support and creates a smooth, flattering shape while still feeling secure when I wear it. The material feels durable, and the multiple rows of hooks make it easy to adjust the fit. I’m very happy with this purchase.
L**D
Extra strength waist trainer ⭐️⭐️⭐️⭐️⭐️
This waist trainer is STELLAR, very well structured and it sucks you right in. Perfect for post partum recovery and it fits very well, allowing you to sit and breathe without any difficulties. I like the material, it’s a very strong latex but it’s lined, making the sweat absorption flawless. Perfect for long term use especially when working ng around the house. I never take mine off, it’s exactly what I was looking for after purchasing some others I am glad I finally found the right fit. The sizing is also adjustable allowing you to wear it at your comfort level.
K**E
Can’t wait
This Faja is amazing it works within 3 weeks.its comfortable and the shaping is amazing .Overall worth every penny !
V**A
Good for gym
Size 25” waist, I’m just got it today and can use the last hook, it’s somewhat of a compressed feeling, but I know it could be tighter. I will be ordering a different one from another brand, but that being said this is soft and flexible enough that I could wear it to the gym, which I will be keeping it for that reason. It seems to be good quality.
G**S
Not my favorite
Great Support, But Runs a Bit Small I purchased the YIANNA Waist Trainer for Women Latex Underbust to help with posture and waist shaping, and overall, I’m pleased with the results. The material is sturdy and offers firm compression, which gives a noticeable slimming effect and great back support. Fit & Sizing: It does run a little small, so I recommend sizing up—especially if you're between sizes or prefer a bit more breathing room. It’s snug, which is expected for a waist trainer, but the initial fit can be tight until it breaks in. Comfort & Wearability: Once adjusted, it’s comfortable enough for a few hours of wear. The hooks are secure, and the latex exterior holds up well. It’s discreet under clothing and doesn’t roll up. Effectiveness: After consistent use, I’ve noticed improved posture and a more defined waistline. It’s a great tool for workouts or daily wear if used responsibly.
I**D
Muy buena
Chicas selos recomiendo la verdad es muy buena calidad y molde bien bonito y pues la verdad hay comentarios algo malos pero quise arriesgar y la verdad que me lleve una sorpresa porque me gusto mucho y pedí talla xs soy talla 4,5 de pantalon
T**M
Too small
This product is a really good quality for its price.i was really disappointed when it arrived and tried to put it on i found it too small for a product that have no sizes to choose from.with this size it would just fit barely girls with no problems with weight or waist size. Not at all recommended for any one with a waist size more that 50 cm
A**R
Highly Recommend
I ordered a size XXL. My current weight is 224 lbs at 5ft 4 inches. The fit is perfect, initial fit is a little snug at first and may require assistance to buckle up. The second day becomes easier, probably due to the stretch. I was able to wear it for 2 hours + on the first day and will be increasing the wear time as the days go on. Goal is to be able to wear it for 8 hours + which seems highly attainable so far. It is also very easy to workout in and feel like my posture is correcting already! I definitely recommend this product!
D**A
no es lo que te venden en realidad
Nose de donde salen las reseñas anteriores que dicen que muy buen producto pero esta super chafa no aprieta y menos te hace figura es literal un pedaso de tela me siento estafada por haber pagado tanto y esperado tanto para un producto tan malo. ahorrense tiempo y no la compren.
A**A
Good
Recommend sizing up
Trustpilot
2 weeks ago
1 week ago