Choosing a performance knit is rarely about one number. Weight, width, fibre blend, surface sheen and stretch recovery all interact, and a mismatch in any one of them shows up later as bagging, shine loss, or a garment that fits differently from the sample.
Quick Summary
- What it is: a bright (high-lustre) polyester and spandex fabric from the Sportwear Series, listed at 250 GSM and 165 cm wide.
- Composition: 85% polyester + 15% spandex.
- Best suited to: activewear, athleisure, uniforms and other garments that need stretch, a smooth hand and visible sheen.
- Customizable: colour, weight and width can be adjusted to your requirements, according to the manufacturer's product page.
Decoding the Name: "50D Bright Polyester 250-165"
Fabric names in this part of the industry are compact, and each element carries meaning:
- 50D refers to a fine 50-denier polyester yarn. Denier is the mass in grams of 9,000 metres of yarn, so a lower figure means a finer yarn and, generally, a softer and lighter hand.
- Bright indicates a high-lustre polyester without delustering additive, which reflects more light and gives a visible sheen. Semi-bright and satin variants sit elsewhere in the range.
- 250 is the fabric weight in grams per square metre (GSM).
- 165 is the fabric width in centimetres.
Reading the name this way lets you compare it quickly against neighbouring products such as 50D Bright Polyester 215-152 or 50D Bright Polyester 185-165 without opening every specification sheet.
Specifications at a Glance
| Parameter | Value | What it means in practice |
|---|---|---|
| Reference | JT32007 | Quote this code in enquiries to avoid confusion with similar items. |
| Weight | 250 GSM | Mid-to-substantial weight for a stretch knit; good body and opacity. |
| Width | 165 cm | Wide roll that supports efficient marker layouts. |
| Composition | 85% polyester + 15% spandex | Substantial elastane content, so strong stretch and recovery. |
| Series | Sportwear Series | Positioned for active and performance apparel. |
| Customization | Colour, weight, width | Listed values describe stock; custom requests can be discussed. |
Source: product page for JT32007, Zhejiang Wanjie Textile New Material Co., Ltd.
A note on completeness: the product page does not publish tensile strength, elongation, shrinkage, colourfastness or pilling grades. Those figures vary by dye lot and finishing route, so we recommend requesting a current test report with your sample rather than relying on typical values.
Why the Blend and Weight Matter
Polyester: the structural backbone
Polyester is hydrophobic, meaning the fibre itself absorbs very little water. That is an advantage in sportswear because moisture moves along the surface of the yarn and through the spaces between yarns, then evaporates, rather than being held inside the fibre. A fine 50D yarn increases the number of filaments and surface channels per unit of fabric, which helps wicking and gives the smooth hand this fabric is known for.
Spandex at 15%: stretch you can design around
Many everyday sports knits carry a lower elastane share. At 15%, this blend sits toward the high-stretch, high-compression end of the range. In practice that means shaped leggings, bodysuits, dance and gym wear, and panels that must hold their form through repeated movement. The trade-off is that higher elastane content makes the fabric more sensitive to heat during pressing, heat-setting and washing, so process control matters (see the care section below).
250 GSM: where comfort meets coverage
A heavier-than-minimum weight gives better opacity during deep squats and stretches, and reduces the chance of a garment becoming see-through when it is pulled over the body. It also adds a touch of insulation, so the fabric is a good fit for cooler-season training and layering. If your target is hot-climate running, you may prefer a lighter option from the range, which is exactly why weight is customizable.
What "Breathable" Does and Does Not Mean
Breathability is influenced more by knit structure, stitch density and finishing than by fibre type alone. A 250 GSM compression-style knit will not ventilate like an open mesh, and it is not meant to. Here, breathability comes from fine yarns, a smooth surface that does not trap damp, and the polyester's quick-drying nature. If your design needs targeted airflow, pair this fabric with ventilation zones made from the Mesh Series, for example under the arms or along the back panel.
Planning Your Cutting: A Practical Calculation
Weight and width together tell you how heavy a metre of fabric is, which helps with freight estimates and costing. For full-width fabric:
250 g/m² × 1.65 m = 412.5 g per linear metre, or about 2.4 linear metres per kilogram.
Treat this as a planning figure. Usable width after trimming selvedges is slightly narrower, and actual GSM carries a normal production tolerance, so confirm the tolerance with your supplier in writing.
Choosing Between Neighbouring Products
| Product | Weight (GSM) | Width (cm) | Typical direction |
|---|---|---|---|
| 185-165 | 185 | 165 | Lighter drape, warm-weather and layering pieces |
| 215-152 | 215 | 152 | Balanced weight, narrower roll |
| 235-160 | 235 | 160 | Middle ground between light and heavy |
| 250-165 (this fabric) | 250 | 165 | Most body and opacity; shaped, supportive garments |
The "typical direction" column is general design guidance, not a manufacturer specification. Composition and finishing for the other items should be confirmed on each product page.
If you are choosing a different look rather than a different weight, the range also includes bright and semi-bright polyester satins, such as Polyester Satin 250-150 and Polyester Semi-Bright 240-156, for a different surface character.
Where This Fabric Works Best
- Leggings and tights: the combination of weight and 15% spandex supports shaping and opacity.
- Bodysuits, dancewear and gymnastics wear: bright lustre photographs and performs well under stage lighting.
- Team and club uniforms: durable, easy-care and available in matched colours.
- Athleisure tops and jackets: a polished surface that transitions from the gym to everyday wear.
Where it is less ideal: very hot, humid conditions with long-duration endurance use, or garments that need an entirely matte, cotton-like surface. In those cases, consider a lighter weight or a semi-bright alternative.
Evaluating a Sample Before You Buy
From experience working with garment makers, the problems that surface late are almost always things that could have been checked at sample stage. A sensible checklist:
- Stretch and recovery: stretch a swatch in both directions, hold it, release it, and look for permanent growth. Ask for formal test data on request.
- Dimensional stability: wash and dry a measured swatch following your intended care label, then re-measure.
- Colourfastness: request results for washing, perspiration and rubbing, especially for deep or saturated shades.
- Lustre consistency: check several metres across the roll under daylight and store lighting, since bright fabrics reveal shade variation more readily than matte ones.
- Opacity under tension: stretch the swatch over your hand against light, or over a skin-tone test surface.
- Sewing behaviour: test needle type, stitch length and seam elasticity; a ballpoint needle and a stretch stitch usually reduce skipped stitches and seam breakage.
Common international test methods are published by bodies such as ISO and AATCC. Ask your supplier which methods their reports follow so that results are comparable with your own quality requirements.
Care and Handling Guidance
Spandex is heat-sensitive, so these general practices help garments keep their shape. Always defer to the care instructions and tests for your specific finished product.
| Stage | Recommendation | Reason |
|---|---|---|
| Laundering | Cool to warm wash, mild detergent, no fabric softener | Softeners can coat fibres and reduce moisture transport. |
| Drying | Air dry or low heat | High heat degrades elastane over time. |
| Ironing | Avoid, or use a low setting with a pressing cloth | Bright polyester can develop shine marks under direct heat. |
| Storage | Roll or lay flat, away from direct sunlight | Prevents creasing and long-term colour fade. |
These are general industry practices, not manufacturer-certified instructions for JT32007.
About the Manufacturer
Zhejiang Wanjie Textile New Material Co., Ltd. presents itself as a fabric innovator, with the tagline "Redefining Fabric Innovation Since 2007." Its catalogue is organised into six series: Sportwear, Corduroy, Velvet, Burnout, Spandex and Mesh. For background on the business, its values, and its patents and certificates, visit the About Us page. Industry insights are shared in the Blog and Company Updates sections.
The company notes that the colour, weight and width shown on its pages reflect stock fabric and can be customised. It also welcomes enquiries from buyers who already have their own fabric or who need a supplier for a specific product.
Frequently Asked Questions
Is this fabric suitable for high-intensity workouts?
The manufacturer positions it for active lifestyles and sportswear. Its polyester content supports moisture management and the spandex provides stretch, but suitability for a given sport depends on climate, garment construction and your performance requirements, so test a sample in your intended use.
Can the colour, weight or width be changed?
According to the product page, yes. The listed values are for in-stock fabric, and custom requests can be discussed. Minimum quantities and lead times are not published, so confirm them when you enquire.
What does "bright" mean for the finished look?
It means a lustrous surface with noticeable sheen. Bright fabrics make colour look more vivid, but they also show seams, pressing marks and shade differences more readily than matte fabrics.
How do I request a sample or quotation?
Use the inquiry form on the product page or the Contact page. Quote reference JT32007, your target colour, expected quantity and end use.
