Item Code D180 is a premium 300 gsm stretch for thermal underwear spacer cotton polyester fabric engineered for structural warmth and active comfort. Featuring a specialized three-layer sandwich construction, this 300 gsm cotton polyester spacer fabric blends 48% Cotton, 45% Polyester, and 7% Spandex to deliver a bulky, structured drape with excellent elasticity. Measuring 165CM in width, D180 is optimized for autumn and winter apparel, balancing the natural comfort of cotton with the dimensional stability of polyester.
Key Specifications
| Parameter | Specification |
|---|---|
| Item Code | D180 |
| Description | Spacer fabric |
| GSM | 300G/M2 |
| Width | 165CM |
| Composition | 48% Cotton / 45% Polyester / 7% Spandex |
Three-Layer Spacer Structure and Thermal Performance

The structural performance of D180 relies on its three-layer spacer structure, which knits together a face layer, a middle cavity, and a back layer. The middle layer utilizes a fluffy filler yarn to create a physical gap, establishing a highly effective insulating air barrier. This static air layer traps body heat and blocks external cold air, providing outstanding thermal insulation without adding heavy bulk.
This knit configuration makes D180 an ideal choice as a stretch for thermal underwear spacer fabric. The integrated air pockets maintain consistent temperature regulation, keeping the wearer warm during low-activity periods and preventing rapid heat loss in cold environments.
Material Synergy: Cotton, Polyester, and Spandex Blend

By blending 48% Cotton, 45% Polyester, and 7% Spandex, the D180 spacer fabric achieves an optimal balance of natural wearability and technical durability. The cotton component provides softness, breathability and natural comfort directly against the skin. Concurrently, the polyester component ensures excellent dimensional stability and quick-drying performance, preventing the fabric from stretching out of shape or retaining excess moisture during active wear.
The addition of 7% Spandex introduces multidirectional stretch, which is essential for form-fitting thermal underwear and activewear. This specific fiber ratio results in a highly resilient textile that combines the moisture absorption and moisture-locking capabilities of its surface layer with the high strength, wear resistance, and low shrinkage rate of synthetic fibers.
Bulky Hand Feel and Crisp, Wrinkle-Resistant Drape

D180 features a thick, bulky hand feel with a pronounced three-dimensional texture that maintains its form under movement. Thanks to the resilient polyester fibers and the structural support of the three-layer sandwich design, this 300 gsm stretch for thermal underwear spacer fabric resists wrinkling and exhibits excellent shape retention.
Garments constructed from D180, such as hoodies and outerwear, maintain a clean, structured silhouette that does not sag or crease easily. The fabric's inherent elasticity allows it to bounce back to its original shape after stretching, ensuring that finished products retain their premium, crisp appearance even after repeated laundry cycles.
Target Applications for D180 Spacer Fabric

With its thermal efficiency and structured drape, D180 is engineered for versatile product lines across autumn and winter collections:
- Autumn and Winter Apparel: Highly suited for premium thermal underwear, structured hoodies, heavyweight sweatshirts, sports jackets, and comfortable casual pants.
- Outdoor and Sportswear: Excellent for athleisure gear and training apparel that require a balance of lightweight warmth, multidirectional stretch, and a crisp, clean silhouette.
Frequently Asked Questions (FAQ)

What is the exact composition of the D180 spacer fabric?
D180 is composed of 48% Cotton, 45% Polyester, and 7% Spandex. This precise blend combines the softness, breathability and natural comfort of cotton with the dimensional stability and quick-drying performance of polyester, reinforced by spandex for added stretch.
What is the width and weight of this fabric?
D180 has a weight of 300G/M2 (300 gsm) and a usable width of 165CM, making it highly suitable for efficient marker layout in garment manufacturing.
How does the three-layer structure provide warmth?
The fabric features an interwoven face layer, a middle cavity, and a back layer. The middle layer uses a fluffy filler yarn to create an open space that traps a layer of still air. This static air barrier effectively retains body heat and insulates against external cold.
Is D180 prone to wrinkling or losing its shape?
No. The combination of polyester fibers and the resilient sandwich structure gives D180 excellent crispness, high elasticity, and wrinkle resistance, ensuring finished garments maintain their shape and do not sag.

How can I get samples of D180 to test the stretch and hand feel?
You can request sample swatches or a sample roll to evaluate the weight, elasticity, and bulky hand feel directly in your sample room.
Ordering & Customization
We provide D180 spacer fabric with a consistent width of 165CM and a weight of 300G/M2. Our technical team is available to assist you in aligning this fabric's unique three-layer structure with your specific garment designs, whether you are developing high-performance thermal underwear or structured outerwear.
To verify the hand feel, drape, and stretch profile of this 48% Cotton / 45% Polyester / 7% Spandex blend, we recommend requesting a physical sample. Contact our team today to discuss your production requirements, obtain current pricing, or arrange for sample shipping.
Written by Wenruo
Textile Engineer, Forall Lab