Thongs
Women's thongs from a Bulgarian manufacturer in sizes S-6XL. We make cotton thongs, lace thongs, microfiber thongs and tulle thongs — with low or high waist. All styles are made from European materials with flat seams that go unnoticed and stay invisible under clothes.
Sexy string Black line
Sexy thongs in black color with a clean line. The model has a solid front part, made of soft microfiber with high elasticity, and the waist in its back part is finished only with an adjustable elastic. The back part is completely elastic with a built-in adjuster, with which you can change the depth of the string. The regulators allow the two sizes to span the full numbering as follows:
ONE SIZE- S to XL
ONE SIZE MAXI- 2XL to 6XL
Black line sexy thong is a model of lingerie, suitable for combining with many erotic accessories such as garters, chokers and bustiers, while being comfortable at the same time.
Wear with pleasure!
Made in Bulgaria by SIA Underwar!
In stock
High waist string Sissy
Women's deep string in beige color.
- The slings are made of elastic microfiber on a polyamide base.
- The front has symmetrical accents of fine lace with a beautiful floral design.
- The cut is clean and the waist is high.
- The elastic at the waist is reinforced with a zigzag seam.
- The beige color is perfect for the summer season.
Made in Bulgaria by SIA Underwear!
In stock
String with lace Elinor
Elegant women's string in purple color.
- The cut of the thongs is classic and comfortable.
- There is a delicate cut at the back, which is decorative.
- The thongs are purple.
- The front is decorated with delicate champagne lace.
- They are made of fine and elastic microdiber.
Made in Bulgaria by SIA Underwear!
In stock
Women's string in blue and yellow
Women's microfiber thongs.
- The model has a classic and clean cut.
- The fabric from which the string is made is fine, elastic microfiber.
- The thongs are in Turkish blue color, and the elastic at the waist and legs is yellow.
- A bold combination for brave ladies!
Made in Bulgaria by SIA Underwear!
In stock
Women's thongs Elinor
Women's elegant thongs in champagne and blue.
- Fine, elastic microfiber.
- Lace accent on the front with a beautiful design in blue.
- Comfortable, cut-out cut that emphasizes the curves.
- Colorful decorative seam in tone with the lace.
Made in Bulgaria by SIA Underwear!
In stock
Black thongs Elinor
Women's thongs in black color.
- Clean cut with comfortable cut, which emphasizes the curves.
- The front has a lace accent with a beautiful red design.
- The main fabric is fine, elastic microfiber.
- The decorative stitching of the thongs emphasizes the lace.
Made in Bulgaria by SIA Underwear!
In stock
Women's string in black and blue Elinor
Women's microfiber thongs.
- The base fabric is a fine, elastic microfiber that sticks like a second skin.
- The cut is comfortable, cut and emphasizes the curves.
- The black color of the string emphasizes the blue lace on the front.
- The thongs are finished with a blue, decorative seam in tune with the lace.
Made in Bulgaria by SIA Underwear!
In stock
Women's string in black and white Elinor
Luxury women's thongs in black with white lace accents.
- Elegant design with comfortable cut.
- The thong is made of fine, elastic microfiber that caresses the skin.
- The front has a beautiful lace accent in a contrasting white color.
- The thongs are finished with a zigzag, a decorative seam that emphasizes the lace.
- Wear with pleasure and enjoy the comfort!
Made in Bulgaria by SIA Underwear!
In stock
Women's string Elonor black and peach
Elegant women's thongs in a combination of black and peach:
- They are made of fine, elastic microfiber.
- Lace accent on the front in a beautiful, contrasting peach color.
- The string is finished with a contrasting, zigzag stitch that emphasizes the lace.
- Gentle and comfortable, this string will emphasize your curves and will fit like a second skin!
Made in Bulgaria by SIA Underwear!
In stock
Women's string Elinor champagne and peach
Elegant women's thongs in a new look:
- The main fabric is thin, highly elastic microfiber in champagne color.
- Lace accent in a different color on the front, which gives a more sophisticated look.
- Decorative, contrasting seam that emphasizes the color of the lace.
- The back has a delicate horizontal cut.
- Gentle, comfortable string that will fit like a second skin!
Made in Bulgaria by SIA Underwear!
In stock
String Simply pretty black
Women's cotton thongs with black color.
The thong has a classic cut, no unnecessary seams and is not marked under the clothes.
Made in Bulgaria by SIA Underwear!
In stock
String Savina
Elegant women's thong in black.
- Classic cut
- High waist.
- No rear cuts.
- With beautiful lace accents on the front.
- With reinforced zigzag seam at the waist.
- Soft and elastic microfiber.
- Guaranteed convenience.
- Enjoy our latest addition - high-waisted thongs now up to 6XL!
Made in Bulgaria by SIA Underwear!
In stock
String Dark blue
Women's thong in dark blue. The model has a classic cut, is made of dense,
highly elastic microfiber, which fits perfectly to your curves.
The strings are finished with a delicate accent of satin ribbon with a shiny stone.
Made in Bulgaria by SIA Underwear!
In stock
String Red
Women's microfiber thongs in red color. The model has a classic cut,
without unnecessary cuts, comfortable and sexy.
The string is finished with a satin ribbon and a shiny stone.
Made in Bulgaria by SIA Underwear!
In stock
String Sissy black
Women's deep microfiber thongs in black color. The model has lace accents on the front, no cuts in the back, with a high waist and is super comfortable. The string is finished with a flat elastic on the legs, and on the waist there is a scalloped elastic with a reinforced zigzag seam. The luxurious look is guaranteed.
Made in Bulgaria by SIA Underwear!
In stock
String Sissy
Women's string with a high waist in dark pink color. The string is made of fine, elastic microfiber, they are comfortable, lace accents on the front give a sexier look, and the back has no cuts for maximum comfort. The model has a reinforced, zigzag seam at the waist, which in addition to strength, brings luxury to the already great look.
Made in Bulgaria by SIA Underwear!
In stock
String White
Sexy microfiber string in white. Feel the thin and elastic material like a second skin and wear it with confidence.
Made in Bulgaria from SIA Underwear!
In stock
String Daisy burgundy
Sexy microfiber string in burgundy with lace accents and adjustable straps.
Made in Bulgaria from SIA Underwear!
In stock
Nude string in microfiber Beige
Sexy microfiber string in beige color.
Made in Bulgaria!
In stock
String Pink
Microfiber string in soft pink color.
Made in Bulgaria!
In stock
Low rise string with print Beige rose
Microfiber string
In stock
WOMEN'S THONGS
Women's thongs for those who want their underwear to disappear under clothes. Minimal back coverage means zero lines under the tightest pants, leggings and dresses. Thong underwear isn't just for special occasions — many women wear them daily for their practicality. At SIA Underwear we make thongs from cotton, microfiber, lace and tulle — from sporty everyday styles to luxurious ones for romantic evenings.
TYPES OF WOMEN'S THONGS BY FABRIC
Cotton thongs
Cotton thongs are proof that minimal underwear can also be practical. Cotton with elastane is breathable and absorbent — ideal for active women who work out or spend long hours on the move. Many women choose cotton thongs for the gym — they don't show under leggings and keep skin fresh. If you've always thought thongs were uncomfortable, try a cotton style in the right size.
Microfiber thongs
Microfiber thongs are a favorite for wearing under formal and fitted clothes. Polyamide is silky smooth and blends with the body without visible edges. Nude under a light dress, black under dark pants — and no one will know what you're wearing underneath. Microfiber dries quickly, doesn't lose shape and keeps its color for a long time.
Lace thongs
Lace thongs are a classic that never goes out of style. European lace adds elegance and femininity without sacrificing comfort. Perfect for special occasions, romantic evenings or simply days when you want to feel more confident. Lace thongs pair easily with a camisole in the same color for a complete look.
Tulle thongs
Tulle thongs are the lightest underwear you can wear. The sheer quality of tulle adds allure, while the polyamide base ensures durability. Ideal for hot summer days when you want minimum fabric on your body. Tulle thongs feel like wearing nothing — but with an elegant appearance.
LOW OR HIGH WAIST THONGS
Thongs with low waist
The classic choice for most women. Low-rise thongs are discreet, don't peek above low-waisted pants and are suitable for everyday wear. Minimalist design, maximum practicality.
Thongs with high waist
High-waisted thongs combine minimal back coverage with tummy support in front. Perfect under high-waisted dresses and skirts — they don't peek out and don't create lines. Microfiber styles with a shaping effect sculpt the silhouette discreetly. Many postpartum women choose this option — tummy comfort, invisibility under clothes.
THONGS OR BRAZILIAN BRIEFS — WHAT'S THE DIFFERENCE
Many women hesitate between thongs and Brazilian briefs. Here's a quick comparison:
Thongs — minimal back coverage (thin string or triangle). Completely invisible under any clothes. May require an adjustment period for some women.
Brazilian briefs — moderate back coverage (more than thongs, less than briefs). Invisible under most clothes. Easier to get used to.
The rule: If Brazilian briefs still show under a specific garment — switch to thongs. For everything else — choose whatever feels more comfortable.
MYTHS ABOUT THONGS
"Thong underwear is uncomfortable." Not if it's the right size and quality material. A size too small or rough fabric is indeed uncomfortable — but that applies to any underwear.
"Thongs are only for young women." Comfort has no age. Many women over 40 and 50 wear thongs daily because they value their practicality under fitted clothes.
"Thongs are unhygienic." Cotton thongs are just as hygienic as cotton briefs. The material, not the cut, determines hygiene.
"Thongs are only for sexy occasions." Cotton and microfiber thongs are made for everyday wear. Lace and tulle ones — yes, they're more suitable for special moments.
HOW TO CHOOSE YOUR SIZE IN THONGS
Size is critical with thong underwear. A size too small will dig in and be uncomfortable. A size too large will bunch up and show under clothes.
Measure your hip circumference at the widest part and compare with our size chart. For your first thong purchase — choose your exact size, not smaller.
We make women's thongs in sizes from S to 6XL.
FREQUENTLY ASKED QUESTIONS
Do thongs dig in? No, if they're the right size. Quality thongs with flat seams and soft fabric don't cause discomfort.
Can I wear thongs every day? Yes, especially cotton styles. Many women wear them daily without any issues.
What color thong should I choose under light clothes? Nude. White can show through, while nude blends with skin.
Are thongs suitable for sports? Yes, cotton thongs are an excellent choice for the gym — they don't show under leggings and absorb moisture.
What thongs should I choose for a special occasion? Lace or tulle in black, burgundy or champagne. Pair with a camisole for a complete set.
Do you make thongs in plus sizes? Yes, from S to 6XL. We offer styles for every figure.
WHY CHOOSE WOMEN'S THONGS FROM SIA UNDERWEAR
Flat seams — our thongs are designed to go unnoticed on the body.
Soft elastics — we use stretchy bands that don't dig in or leave marks.
Made in Bulgaria — we control every step of production in our facility.
European materials — cotton, microfiber, lace and tulle from Italy, Greece and Turkey.
Sizes S-6XL — thongs for every figure, including plus sizes.
Choose women's thongs from SIA Underwear — invisible under clothes and comfortable all day. See more bottoms in our women's underwear category
WOMEN'S THONGS
TYPES OF WOMEN'S THONGS BY FABRIC
LOW OR HIGH WAIST THONGS
THONGS OR BRAZILIAN BRIEFS — WHAT'S THE DIFFERENCE
MYTHS ABOUT THONGS
HOW TO CHOOSE YOUR SIZE IN THONGS
FREQUENTLY ASKED QUESTIONS
WHY CHOOSE WOMEN'S THONGS FROM SIA UNDERWEAR
