Do these provide firm control on the stomach?

It is a light control only. smoothing rather than shaping.

Are they truly from the brand Spanx?

Yes they are, and they are marvellous under tight jeans X

I'm a small size 12, what size should I buy?

Hello Carmen, Thank you for your message. For a size 12, I would recommend a Medium in this style

Are these seamless and can they be worn with a low back dress?

They are seamless, it would though depend on how low the backless dress is...they are designed to be high waisted.

Womens Undie Tectable Brief Thong Naked 3 0 Xl Uk

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Shape your day, not just your look 💃

TAILORED FIT - Available in XL UK with a precise size guide to guarantee your perfect, flattering fit.
ALL DAY CONFIDENCE - Light targeted tummy and bottom shaping for a sleek silhouette that lasts from AM to PM.
INVISIBLE UNDERNEATH - Thong design ensures zero visible panty lines—your secret weapon for flawless outfits.
COMFORT MEETS CONTROL - Soft, elastic-free waistband with no-slip strip prevents digging, pinching, or rolling all day long.
WOMEN FIRST INNOVATION - Crafted by Spanx, a brand dedicated to empowering women with comfort and style.

The Spanx Womens Undie-tectable Brief Thong in Naked 3.0 XL UK offers firm Level 2 shaping with a lightweight, high-stretch nylon-spandex blend. Designed for all-day comfort, it features a soft, elastic-free waistband with a no-slip strip and a thong cut to eliminate visible panty lines. Perfect for professional women seeking subtle tummy and bottom control without sacrificing comfort or style.

Specifications

ASIN	B09MSQ6WHZ
ASIN	B09MSQ6WHZ
Age Range Description	Adult
Apparel Fabric Stretch	High Stretch
Apparel Fabric Weight Class	Lightweight
Best Sellers Rank	374,060 in Fashion ( See Top 100 in Fashion ) 571 in Women's Control Knickers
Bottom Style	Thongs
Brand Name	Spanx
Colour	Naked 3.0
Country Of Origin	Colombia
Customer Reviews	3.5 3.5 out of 5 stars (44)
Customer reviews	3.5 3.5 out of 5 stars (44)
Date First Available	1 April 2023
Department	Women's
Fabric Type	90% Nylon, 10% Spandex/Elastane
Fit Type	fitted
Fit to Size Sentiment	Positive
Garment Size Country	Great Britain
Item Type Name	Thong
Item Weight	0.07 Pounds
Item model number	SS0815
Manufacturer	SPANX
Manufacturer	SPANX
Manufacturer Part Number	SS0815
Material Type	Nylon
Model Number	SS0815
Number of Items	1
Pattern	Solid
Product Care Instructions	Machine wash warm and tumble dry low
Product Dimensions	29 x 0.05 x 22 cm; 31.75 g
Rise Style	Low
Season and Collection Year	EVERYDAY SHAPING
Size	XL
Special Features	Tummy Control
Style Name	Thong
Subject Character	Thong
Theme	Sports
UPC	843953308515
Unit Count	1.0 count

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