Leggings are one of the most popular items in a woman's wardrobe: versatile, comfortable, and perfect for sports but also for casual and urban looks.
But if you search for them online or talk to someone about them, you might come across many different names: fuseaux, jeggings, treggings, pants, shapewear leggings.
Are they all synonyms? Or are there real differences?
In this article, we'll explain what leggings are called, the most common variations, and when to choose one style over another.
Leggings and synonyms: let's clarify
Over time and with the evolution of fashion, leggings have taken on different names depending on the fabric, shape, and function. Here are the main ones:
Leggings
Often thought of as a synonym for leggings, they're actually distinguished by the stirrup under the foot, which keeps the pants taut during movement. Leggings have sporting origins (dance, skiing) and a retro aesthetic. Today, they're less common, but still found in technical or vintage contexts.
Jeggings
They're a fusion of jeans and leggings. They're extremely stretchy pants with a denim-like look, ideal for those who want the comfort of leggings without sacrificing the look of jeans. They're not typically designed for exercise, but FGM04 has developed innovative models with a jeans-effect texture which, while maintaining the look of classic denim, is soft, flexible and also perfect for training. The Jeans Line comprehends basic jeggings And push-up jeggings, push-up flared jeggings.
Treggings
A cross between trousers and leggings, treggings have sleeker lines and tailored details: stitching, zippers, and belt loops. Great for formal or office looks, but not ideal for sports.
Pants
The English term "pants" is often used to refer to trousers in general, even tight-fitting ones. It's not a true synonym for leggings, but it can refer to similar styles, especially in the fitness context (yoga pants, workout pants).

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Functional Legging Variations: Not Just a Name
Other terms, while referring to leggings, indicate their technical or aesthetic characteristics. Let's look at the main ones.
Seamless leggings
They're made with a single knit, with very few seams along the body, using special circular knitting machines. They offer greater comfort and a cleaner, more uniform look. All leggings made by FGM04 are seamless.
Cut and sew leggings (with traditional seams)
They have visible seams that can cause chafing and irritation.
Shaping leggings
Designed to provide a shaping and slimming effect, shaping leggings stand out for their use of stretchy fabrics with varying levels of compression, adapting naturally to the body. They redefine the silhouette, promote better posture, and provide a pleasant feeling of support throughout the day, both during everyday activities and during sports.
FGM04 leggings are particularly popular because they combine shaping effectiveness with extraordinary comfort: while offering support and definition, they are made of soft and skin-friendly materials, designed to accompany movements lightly and without constriction.
Basic leggings
Seamless leggings on the buttocks.
Soft push-up leggings
THE soft push-up leggings They lift and shape curves in a natural way.
Push-up leggings
Designed to lift and enhance the buttocks, these leggings they lift and separate the buttocks also thanks to a characteristic curl.

Sports / fitness leggings
Made from technical, breathable, and durable fabrics, they're ideal for workouts, yoga, and running. They often feature flatlock seams to prevent chafing and a high waist for improved performance.
Cosmetic leggings or cosmetotextiles
In the world of cosmetotextile leggings, there are different technologies, each with specific functions and benefits.
Some models are based on the graduated compression, or decreasing pressure from bottom to top to stimulate circulation and offer a slimming effect. However, to be truly effective, these leggings they must tighten firmly, which is not always appreciated by everyone: they can be uncomfortable, especially for prolonged use or on hot days.
Other models focus on a simpler and more temporary approach: they do sweat more, promoting the elimination of excess fluids, but without acting deeply on the tissues.
Then there are the cosmetotextile leggings with active ingredients incorporated into the fabric (such as caffeine, aloe, and gotu kola), which release beneficial substances upon contact with the skin. The limit? The effects tend to gradually decrease with washing., until it runs out completely.
Different, however, are the leggings with FIR technology (far infrared rays), like those proposed by FGM04: they contain bioactive minerals integrated directly into the fiber, capable of stimulating microcirculation and improving cellular metabolism.
The substantial difference is that the benefits of FIR they remain active over time, even after numerous washes, offering an effective, long-lasting and comfortable cosmetic solution.
The fabric made with FIR technology of which they are composed helps to:
- Improve microcirculation;
- Drain excess fluids;
- Reduce water retention;
- Promote muscle recovery.
Warning: not all names indicate actual leggings
Other terms that actually indicate different items are often used as synonyms:
- Tights: Thin, transparent, it also covers the feet. Not suitable for sports or everyday use.
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Tights: Similar to tights but designed to be worn under skirts or dresses. Totally different from leggings.
- Tight trousers: generic term that can refer to leggings, treggings, or skinny jeans, but does not indicate a specific category.
Why is it important to know these differences?
If you work in fashion or are looking for the right garment for a specific purpose (shaping, working out, improving your skin), knowing the correct name helps you make better choices.
Discover the FGM04 leggings: comfort, style, and cosmetic treatment.
At FGM04 you'll find leggings that aren't just tight-fitting pants: they're allies of beauty and well-being, designed to offer a shaping effect and help you combat the unsightly appearance of cellulite thanks to cosmetotextile technology.
You can choose between:
- Basic, soft and super push-up models to enhance your curves
- Shaping leggings to improve your silhouette
- High-impact cosmetic versions for visibly firmer skin
Discover all the leggings available here
