Why Elastic Threads Are Essential for Underwear and Swimwear Production
When customers choose underwear or swimwear, they rarely think about the sewing thread. They focus on comfort, fit, softness, and durability. Yet behind every well-fitting bra, seamless brief, or perfectly shaped swimsuit lies a technical decision that directly affects performance: the choice of thread.
In stretch garments, thread is not just a connector of fabric panels. It is a structural component that must move with the body, withstand tension, and maintain seam integrity after repeated washing and wear. That is why selecting the right elastic sewing thread for underwear and swimwear is fundamental.
In this article, we explain why elasticity matters so much in intimate and swim garments, and how threads such as ATENA and AKMENA support professional manufacturers in achieving reliable, elegant results.
Why Does Underwear and Swimwear Need Elastic Sewing Threads?
Underwear and swimwear are built from highly elastic materials: knits, microfiber blends, stretch lace, and performance fabrics. These textiles are designed to expand and recover without losing shape.
If the seam does not stretch at the same rate as the fabric, problems quickly appear:
- seam cracking under tension
- distorted garment shape
- discomfort for the wearer
- reduced product lifespan
For this reason, manufacturers require stretch sewing threads for sportswear and lingerie that can follow the movement of the fabric without breaking or creating rigid seam lines.
Elasticity in thread ensures that the seam becomes an integrated part of the garment’s stretch system rather than a weak point.
What Makes ATENA Suitable for Elastic Garments?
ATENA is a textured polyester thread developed specifically for applications requiring high elongation and flexibility. Its structure is designed to provide excellent elasticity while maintaining reliable sewing performance.
What makes ATENA distinctive is its special production method: the components are combined and twisted in a way that ensures outstanding sewing properties. This construction enhances cohesion between filaments and supports stable performance even during high-speed industrial sewing.
Because of its high stretch capacity, ATENA is particularly suitable for:
- sportswear
- thermoactive clothing
- personal underwear
- swimwear
- decorative corsetry elements
It is also recommended for elastic stitches, hemming, overlock operations, quilting, and buttonhole machines (depending on the selected variant).
For manufacturers working with body-contouring garments, ATENA functions as a professional thread for elastic seams, helping maintain flexibility without compromising seam strength.
Why Elasticity Alone Is Not Enough
Elasticity must always be balanced with durability. Underwear and swimwear are exposed to frequent washing, mechanical stress, and constant movement.
ATENA combines elongation with appropriate breaking strength for its linear density. For example:
- ATENA 80 offers 1500 cN breaking strength
- ATENA 100 provides 1100 cN
- ATENA 160 ensures 800 cN
This balance allows seams to stretch while remaining structurally stable. In addition, recommended needle ranges (from 70–110 depending on variant) support smooth penetration and reduce fabric damage.
The result is a seam that stretches naturally and returns to shape—an essential feature in high-quality lingerie and swim garments.
Where Does AKMENA Fit into Underwear and Premium Garment Production?
While ATENA is the primary choice for highly elastic seams, AKMENA plays an important complementary role in refined apparel and decorative applications.
AKMENA is a core-spun thread with a polyester core and cotton wrap, subjected to special technological operations that give it maximum smoothness. One of its key advantages is the practical absence of cotton lint on the thread surface. This significantly reduces thread breakage and ensures excellent sewing efficiency—especially in conditions where the needle heats up in high-speed machines.
AKMENA is primarily used in:
- exclusive garment production
- machine embroidery
- difficult seams
- buttonhole machines
- finishing of leather goods
In the context of underwear and premium apparel, AKMENA is particularly valuable for decorative stitching, embroidery elements (such as logos or refined finishing), and precise seam construction where visual quality is essential.
Its high seam quality ensures an elegant appearance—important for luxury lingerie or visible decorative details.
Elastic Seams in Swimwear: Why Thread Choice Is Critical
Swimwear faces additional challenges beyond stretch:
- constant exposure to water
- tension when wet
- body movement under load
A seam that lacks flexibility may fail under these conditions. That is why manufacturers rely on elastic polyester sewing thread such as ATENA for core structural seams in swimsuits.
Meanwhile, for decorative elements or branding details applied through machine embroidery, AKMENA provides the smoothness and sewing stability required for clean, precise results.
This division of roles—elastic thread for stretch zones, smooth core-spun thread for refined details—allows manufacturers to optimise both performance and aesthetics.
Choosing the Right Thickness for the Right Application
Thread selection must consider fabric weight and seam type. ATENA is available in multiple thicknesses (80, 100, 160, 180), allowing adaptation to different garment constructions.
- ATENA 80 and 100 are commonly used for sportswear and thermoactive garments.
- ATENA 160 is suitable for men’s and women’s clothing, underwear, swimwear, decorative corsetry elements, and overlock operations.
AKMENA 120, with a minimum breaking strength of 1050 cN and recommended needle size 80–90, supports stable, elegant seams in premium garments and embroidery applications.
Correct alignment of thread, needle, and machine settings ensures seam durability and consistent production quality.
Building Trust Through Technical Precision
Consumers may never see the thread inside their garment, but they experience its performance every day. A comfortable bra band that stretches naturally. A swimsuit seam that does not distort after swimming. An embroidered logo that remains clean and refined.
These outcomes are the result of technical decisions made during manufacturing.
By selecting proven solutions such as ATENA for elastic construction and AKMENA for smooth, high-quality finishing, manufacturers demonstrate attention to detail and commitment to durability.
Small Component, Major Impact
In underwear and swimwear production, thread is not a secondary material. It is a functional element that directly influences comfort, elasticity, and long-term wear performance.
ATENA delivers the stretch required for dynamic garments.
AKMENA ensures smooth, elegant results in precision and decorative applications.
Together, they support manufacturers in creating garments that not only look refined but also perform reliably in everyday use.
