Women’s Underwear

WOMEN'S UNDERWEAR

 Women's underwear from a Bulgarian manufacturer in sizes S-6XL. Underwear is the first thing you put on in the morning and the last thing you take off at night. It touches your skin longer than any other garment. That's why what you wear underneath matters — not just how it looks, but how it feels. At SIA Underwear, we craft lingerie from European materials with attention to every detail. Underwear you don't need to adjust throughout the day. Underwear that makes you feel good.

Every woman has different lingerie needs — some seek comfort for everyday wear, others elegance for special occasions, and still others functionality under certain outfits. In our collection, you'll find a complete range of styles covering all these needs. From classic cotton bikini briefs for daily wear to luxurious lace sets for romantic evenings. From invisible microfiber underwear under tight clothing to shaping styles that sculpt your silhouette.

We've been producing women's underwear in Bulgaria since 2000. Over these 25 years, we've learned that quality lingerie isn't just about materials. Quality lingerie is also the result of perfect tailoring, attention to detail, understanding the female body and its needs. That's why we create each style with precision and care, ensuring every seam is invisible and comfortable against the skin.

TYPES OF WOMEN'S UNDERWEAR

Contemporary women's underwear offers a variety of styles for every need — from everyday cotton bikini briefs to luxurious lace sets. At SIA Underwear, you'll find a complete range of bottoms, tops, and functional lingerie. Each style is designed with a specific purpose in mind — there's lingerie for the office, for sports, for romantic evenings, for particular outfits. Choosing the right style depends on what you'll wear over it and how you want to feel throughout the day.

Bottoms

Bikini briefs — the classic style with moderate coverage, suitable for any age. Bikini briefs are the universal choice for women who want balance between comfort and femininity. We offer bikini briefs with low and high waist in different materials: cotton bikini briefs for everyday wear, lace bikini briefs for special occasions, microfiber bikini briefs under tight clothing, and tulle bikini briefs for summer. High-waist styles provide additional comfort and discretion, while low-rise styles are perfect under jeans and low-waist trousers.

Brazilian briefs — the style that combines the comfort of bikini briefs with the sex appeal of thongs. Brazilian briefs have a narrower back that accentuates curves without showing under clothing. This style is the ideal choice for women who want feminine underwear with moderate coverage. We offer cotton Brazilian briefs, lace Brazilian briefs, microfiber Brazilian briefs, and tulle Brazilian briefs. Brazilian briefs are especially popular among women aged 25-45 who value the combination of comfort and elegance.

Boxer briefs — comfortable and practical, with maximum coverage. Women's boxer briefs are ideal for sports, home wear, or under looser clothing. This style provides complete comfort and prevents chafing between thighs. Choose between cotton boxer briefs, lace boxer briefs, and microfiber boxer briefs. Boxer briefs are an excellent choice for active women, for pregnant women, and for anyone who prefers maximum coverage without compromising femininity.

Thongs — the minimalist choice for women who want underwear to remain completely invisible. Thongs are perfect under tight trousers and dresses, under white clothing, and anywhere standard underwear would show. This style is indispensable for special occasions and for fitted garments. Despite minimal coverage, quality thongs are surprisingly comfortable for all-day wear.

Tops and sets

Bralettes — elegant tops that can be worn alone or as part of a set. Bralettes are suitable for women who don't wear bras but want light support and coverage. We offer cotton bralettes, tulle bralettes, and microfiber bralettes. Bralettes are an excellent choice for warm months, for home wear, and for women with smaller busts who don't need structured support.

Bustiers — short tops with light support that can be worn under sheer blouses or alone at home. Bustiers combine the functionality of a tank top with the femininity of lingerie.  

Lingerie sets — coordinated top and bottom in one design and color. Lingerie sets are ideal as gifts or for special occasions. Coordinated lingerie creates a sense of completeness and attention to detail. Women who wear sets share that they feel more confident and feminine, even when no one else sees their underwear. Sets are especially appropriate for anniversaries, romantic weekends, and first dates.

Garters — a sexy accessory that adds the finishing touch to any set. We offer leg garters and bridal garters. Garters aren't just a functional element for holding up stockings — they're a symbol of femininity and elegance.  

Functional lingerie

Shapewear — styles with a smoothing effect that sculpt the silhouette and provide confidence under fitted clothing. Shapewear works on the principle of light compression that distributes tissue evenly and creates a smooth silhouette. This isn't a corset and doesn't restrict movement — it simply shapes the body in an unobtrusive way. It's ideal under formal dresses, business suits, and for special events when you want to look impeccable.

Slips — smooth slips for dresses and skirts that provide comfort and prevent see-through. Slips eliminate static electricity, protect against transparency in thin fabrics, and provide an additional layer between skin and outer garments. They're indispensable under summer dresses, formal skirts, and anywhere you want to feel confident that your clothes fall perfectly.

Anti-chafing underwear — special shorts that protect the inner thighs from chafing during warm months. Chafing is a serious problem for many women during summer, especially when wearing dresses and skirts without tights. Our anti-chafing shorts are made from breathable materials with a smooth texture that eliminates friction without creating discomfort. Women who try this product once share that it transforms their summer experience.

FABRICS FOR WOMEN'S UNDERWEAR

The choice of material is crucial for the comfort of women's underwear. At SIA Underwear, we use high-quality materials from Italy, Greece, and Turkey. Each material has unique characteristics that make it suitable for different needs and seasons.

Cotton — the most natural choice for everyday women's underwear. Cotton is breathable, moisture-absorbent, and hypoallergenic. We use cotton with elastane that maintains its shape after multiple washes and provides freedom of movement. Cotton underwear is ideal for women with sensitive skin, for summer, and for all-day wear. The material absorbs moisture naturally and prevents overheating.  

Polyamide (microfiber) — a high-quality material with exceptional softness and silky feel. Women's underwear made from polyamide fits like a second skin, dries quickly, and is invisible under tight clothing. Unlike polyester, polyamide is more durable and incomparably more pleasant against the skin. Microfiber is an excellent choice for the office, formal occasions, and any situation when you want an impeccable silhouette. The smooth surface doesn't create lines under fitted dresses and trousers. The material's elasticity ensures perfect fit without being restrictive.

Lace — the symbol of luxurious women's underwear. Lace styles are elegant and perfect for special moments. We use quality European lace from Italy and Turkey that is soft and doesn't irritate the skin. Lace adds visual refinement and transforms ordinary underwear into a small luxury. Floral motifs and delicate patterns create a sense of femininity and elegance.  

Tulle — transparent, light, and ethereal material. Tulle underwear creates a feeling of lightness and is ideal for summer. Tulle on a polyamide base is elastic and durable. The airy structure allows maximum ventilation, while elasticity ensures perfect fit. Tulle is an excellent choice for romantic occasions, hot summer days, and for women who love delicate, feminine styles. The transparency adds a note of allure.

HOW TO CHOOSE WOMEN'S UNDERWEAR

Choosing the right women's underwear depends on several key factors — the purpose, the clothing you'll wear, and your body shape. Each of these aspects plays a role in how comfortable and confident you'll feel throughout the day.

According to purpose

For everyday wear, choose cotton bikini briefs or Brazilian briefs — they're breathable, comfortable, and suitable for long wear. Cotton provides freshness from morning to evening and is the best choice for workdays, walks, and daily activities. Styles with elastane maintain their shape after multiple washes and don't deform.

For special occasions — lace or satin styles that make you feel confident. Lace sets add a touch of luxury and femininity to romantic evenings, anniversaries, or first dates. Choosing beautiful lingerie isn't just for others — it's a way to feel special for yourself.

For sports — cotton or microfiber boxer briefs with a wide waistband. Boxer briefs provide maximum support during movement and prevent chafing. Cotton styles absorb moisture, while microfiber styles dry quickly after intense workouts. Both options are suitable for fitness, yoga, running, and other athletic activities.

According to clothing

Under light or tight clothing, wear nude-colored microfiber underwear without elastic bands — it remains completely invisible. The nude color blends with skin and doesn't show through white, beige, or pastel fabrics. The smooth surface of microfiber doesn't create lines under fitted dresses and trousers.

Under dark clothing, any color is suitable, but black remains the classic choice. Black underwear is universal — it works under black, navy, brown, and gray garments. It's practical to have several pairs of black underwear in rotation for formal and everyday situations.

Under dresses and skirts, add a slip for a smooth silhouette. Slips eliminate static electricity, prevent see-through with thin fabrics, and provide comfort during movement. They're especially useful under summer dresses and formal attire.

According to size

The right size is the difference between underwear you forget you're wearing and underwear that reminds you of itself all day. Underwear that's too small squeezes, leaves marks, and creates visible lines under clothing. Underwear that's too large bunches up, shifts around, and creates excess bulk.

Measure your waist and hip circumference with a soft measuring tape. Compare your measurements with our size chart. When in doubt between two sizes, choose the larger one for more comfort. Cotton styles are less elastic than microfiber ones — keep this in mind when choosing.

We offer women's underwear in sizes from S to 6XL. All styles are available in the full size range, without compromising design or quality. If you can't find your size in the standard range, we can create custom-made pieces up to 10XL — see conditions in the Plus size lingerie category.

CARING FOR WOMEN'S UNDERWEAR

Proper care extends the life of underwear and preserves its qualities. Each fabric requires specific treatment to maintain its softness, elasticity, and color over time.

Washing — we recommend hand washing in cool water up to 30°C with a delicate detergent. For machine washing, use a mesh laundry bag and a delicate cycle. Avoid bleach and harsh detergents — they destroy elastic fibers and degrade fabric quality. Cotton styles can tolerate temperatures up to 40°C, but lower temperature is always safer for longevity.

Drying — let underwear air dry naturally, away from direct sunlight. Don't use a dryer — high temperature deforms the fabric and destroys elastane. Sunlight fades colors, especially on lace and colored styles. It's best to dry in shade, on a flat surface or on a hanger. Don't wring forcefully — let water drain naturally.

Storage — store women's underwear in a separate drawer without crushing it. Arrange lace styles carefully so they don't snag on other garments. Avoid folding repeatedly in the same place — this weakens elastic fibers. With proper storage, underwear maintains its shape longer and looks like new after each wear.

Fabric-specific care — lace and tulle styles require the most delicate treatment. Always wash them in a bag or by hand. Microfiber styles are the least demanding and withstand machine washing well. For all fabrics, avoid high-speed spin cycles.

FREQUENTLY ASKED QUESTIONS

How do I choose the right size for women's underwear? Measure your waist and hip circumference and compare with our size chart. When in doubt, choose the larger size. Cotton styles are less elastic than microfiber ones, so with cotton it's safer to choose the larger size if you're between two sizes.

What underwear is best for everyday wear? Cotton bikini briefs or Brazilian briefs with elastane. They're breathable, comfortable, and suitable for extended wear. Cotton provides freshness throughout the day and is the best choice for work, walks, and daily activities. For warmer months, cotton is indispensable.

What underwear should I wear under tight clothing? Brazilian briefs or thongs made from microfiber in nude color. The smooth fabric without elastic bands remains invisible under fitted trousers, dresses, and skirts. The nude color blends with skin and doesn't show through even under light fabrics. For maximum invisibility, choose seamless styles.

What is anti-chafing underwear? Functional underwear that protects the inner thighs from friction and irritation. Ideal for summer under dresses and skirts. Anti-chafing shorts are made from breathable fabrics with a smooth texture that eliminates friction. Women who try them share that they transform their experience during hot months.

What underwear is suitable as a gift? A lace set or luxurious microfiber in a classic color — black, burgundy, or champagne. Sets create a sense of completeness and attention to detail. Lace styles are suitable for romantic occasions, while microfiber ones are more universal and practical for everyday wear.

Can I order custom-sized underwear? Yes, we create women's underwear with custom measurements up to 10XL. Contact us for details. Special orders require precise measurements and a bit more production time, but guarantee a perfect fit. See conditions in the plus size lingerie category.

Do you offer bridal lingerie? Yes, we have a special bridal lingerie category with styles for brides, including lingerie for brides and bridal garters. We offer white and champagne-colored styles in lace and tulle, perfect for the special day.

How do I choose between cotton and microfiber? Cotton — if you're looking for natural fabric and maximum ventilation. Microfiber — if you want a smooth silhouette under tight clothing. Cotton is more suitable for everyday wear and summer, while microfiber is ideal for the office and formal occasions. Both fabrics are comfortable; the choice depends on your priorities.

WHY CHOOSE WOMEN'S UNDERWEAR FROM SIA UNDERWEAR

Bulgarian manufacturing — every style is created in our production facility with quality control at every stage. We've been producing in Sofia since 2000 and understand well the needs of Bulgarian women. Every style passes strict inspection before reaching you. This allows us to guarantee quality you can touch and feel.

Sizes from S to 6XL — women's underwear for every figure, with the option for custom measurements up to 10XL. We believe every woman deserves to feel beautiful and comfortable in her own underwear. That's why we offer a full size range and adapt our cuts to different body types. See plus size lingerie.

25 years of experience — since 2000, we've been creating underwear that combines comfort, quality, and affordable prices. Over these years, we've learned what makes underwear truly comfortable. Our experience is your guarantee of quality.

Expert advice — we help you choose the right style and size. Our team knows every style in the collection and can advise you on which underwear is most suitable for your needs. Contact us for advice — we'll be happy to answer all your questions.

Browse the collection and choose women's underwear you'll wear with pleasure!

WOMEN'S UNDERWEAR

TYPES OF WOMEN'S UNDERWEAR

FABRICS FOR WOMEN'S UNDERWEAR

HOW TO CHOOSE WOMEN'S UNDERWEAR

CARING FOR WOMEN'S UNDERWEAR

CARING FOR WOMEN'S UNDERWEAR

FREQUENTLY ASKED QUESTIONS

WHY CHOOSE WOMEN'S UNDERWEAR FROM SIA UNDERWEAR