Yes. The main fabric of KN04 is listed as 100% mulberry silk. 鈥淜nitted鈥?refers to how the yarn is formed into fabric, not which fiber the yarn contains.
Our customer service team has received two recurring questions about this style: Why does it look less glossy than silk satin, and why does it have more give than shoppers expect from silk?
Neither shine nor stretch can confirm fiber content on its own.
What KN04 Is Made From
Current product records list the following details:
| Garment detail | Listed information |
|---|---|
| Main fabric | 100% mulberry silk |
| Fabric structure | Double knit |
| Fabric weight | 70 GSM |
| Lace | 87% nylon, 13% spandex |
The spandex is listed in the lace, not the silk body fabric.
These figures come from current product and composition records. No third-party fiber-content report is available, so the fabric is not described here as laboratory verified.
The close-up below shows the silk body and lace as separate material areas rather than treating the garment as one uniform fabric.
Why It Does Not Look Like Silk Satin
A satin weave leaves longer sections of yarn visible on the face of the fabric. This creates a flatter-looking surface and a more continuous reflection. (Textiles History)
The silk body of KN04 uses a double-knit construction. Its connected loops create the fine, regular texture visible in the close-up image. In the available product photographs, the reflection appears less continuous than it does on woven satin.
SPA34 provides a visual comparison. Current product records identify its main body as woven silk satin, excluding the elastic. SPA34 shows a flatter-looking surface, while the knitted style has a more visible surface texture.
This is a product-image comparison, not a controlled photography test. Lighting, camera exposure, garment shape, color, and angle may affect the amount of visible shine.
Where the Give Comes From
Knitted fabric is formed by pulling yarn through a series of interconnected loops. The loop structure can change shape under tension and contribute to the movement seen in a garment. The amount of movement also depends on the yarn, knit structure, finishing, and garment design. (Wilson College of Textiles)
In the hand-stretch image, the silk body and lace move together. The double-knit structure can contribute to the give seen in the main fabric, while the lace contains 13% spandex.
The image does not show how much extension comes from each section. No standardized stretch or recovery comparison has been completed between KN04 and SPA34, so no stretch percentages, recovery ratings, or repeated-wash performance claims are made.
Read the Composition by Garment Section
For KN04, the main fabric and lace are listed separately. Other styles may also identify the body, gusset, lining, elastic, or trim as different material sections.
FTC guidance allows some elastic, decorative, or separately constructed sections to qualify for separate or excluded disclosure, depending on their use and size. Fibers intentionally added to the main fabric cannot be left out while that fabric is described as 鈥?00% silk.鈥?(Federal Trade Commission)
Use the listed composition to identify the fibers. Surface appearance and movement are more useful for understanding how the fabric is constructed.
Comparing KN04 and SPA34
KN04 has a visibly textured knit surface and overall garment give. SPA34 presents the flatter surface associated with woven satin, while its elastic remains a separate component.
The comparison does not measure silk grade, fiber purity, or laboratory-tested performance.
Browse more frequently chosen silk underwear styles in FEELITS Customer Favorites.
Frequently Asked Questions
Is knitted silk real silk?
Yes. Knitted fabric can be made from silk. Current product records list KN04鈥檚 main fabric as 100% mulberry silk.
Why does KN04 stretch if its main fabric is 100% silk?
Its double-knit structure can contribute to the give seen in the garment. The lace is a separate section containing 13% spandex, and no test has measured how much each area contributes.
Can shine prove whether a fabric is real silk?
No. Manufactured fibers can also be made into glossy satin, while silk yarn can be knitted into a more textured surface. Check the listed composition rather than relying on shine alone.
Does KN04鈥檚 main fabric contain spandex?
Current product records list the main fabric as 100% mulberry silk. Spandex is listed only in the separate lace section.
Does 鈥?00% silk鈥?mean every part of the underwear is silk?
The statement must be read with any sectional or exclusion wording. The main fabric may be listed as 100% silk while other sections are identified separately where labeling rules permit. KN04 lists its main fabric and lace as different material sections.
