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The Advantages of Spun Polyester Thread Over Cotton Thread

Filament Thread

When it comes to sewing projects, choosing the right thread is just as important as choosing the right fabric. Choosing between spun polyester thread and cotton thread is one of the most common dilemmas in sewing. In this article, we will examine the benefits of using spun polyester thread over cotton thread.

Spun Polyester Thread vs. Cotton Thread

Cotton thread is a classic choice for sewing projects. It is affordable, widely available in many colors, and easy to sew with. However, spun polyester thread is often a better choice for many projects.

Spun polyester thread is made from synthetic fibers and offers superior durability and strength than cotton thread. It is commonly used for industrial sewing projects such as car seats, outdoor gear, and marine upholstery. Spun polyester thread is available in many colors and can be used for a wide range of sewing projects, including apparel, home decor, and quilting.

Top 4 Advantages of Using Spun Polyester Thread

  1. Durability and Strength: Spun polyester thread is stronger and more durable than cotton thread. It can withstand more stress, tension, and wear and tear, making it an excellent choice for heavy-duty sewing projects.
  2. Resistance to UV Rays: Spun polyester thread is UV resistant, making it ideal for outdoor projects that will be exposed to sunlight. Over time, cotton thread can break down and weaken due to exposure to UV rays.
  3. Resistance to Water: Spun polyester thread is more water-resistant than cotton thread. This makes it a suitable choice for outdoor projects that will be exposed to moisture, such as rain or snow.
  4. Minimal Stretch: Most spun polyester threads have minimal stretch, making it ideal for sewing fabrics that are prone to stretching, such as knits or stretch denim.

Comparison of Spun Polyester Thread and Cotton Thread

Thread TypeProsCons
Spun Polyester ThreadDurable, strongMore expensive than cotton
Resistant to UV raysLimited color selection
Water-resistantCan be more difficult to
Minimal stretch, ideal for knitswork with than cotton
Wide range of uses
Cotton ThreadAffordable, widely availableProne to breaking down
Easy to use and sewin UV light and water
Available in many colorsProne to stretching
Limited strength for heavy
duty sewing projects


Spun polyester thread is a superior choice for many sewing projects due to its strength, durability, and resistance to UV rays and water. While cotton thread is classic and common, it may not hold up as well over time compared to spun polyester thread. Consider using spun polyester thread for heavy-duty and outdoor projects, or when working with stretchy fabrics that require minimal stretch in the thread. Finally, keep in mind that while spun polyester thread may be more expensive, the benefits and longevity of the thread make it a worthwhile investment in the crafting process.