What is "Interlock" - Definition & Explanation
Last Updated on: 16-Feb-2023 (7 months, 8 days ago)
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In the realm of textiles, interlock refers to a specific type of knit fabric with unique characteristics. Interlock fabrics are highly versatile and widely used in various applications due to their superior stretch, breathability, and comfort. This article aims to provide an in-depth understanding of interlock, including its history, types, tips for handling, and profiles of top international users and manufacturers.

History and Origin

The origins of interlock can be traced back to the early 19th century when the industrial revolution revolutionized textile manufacturing processes. Interlock fabric emerged as a result of advancements in knitting technology, particularly the development of double-knit machines. This innovation allowed for the production of a double-faced fabric with interlocking loops on both sides, giving birth to what we now know as interlock.

Types of Interlock

Interlock fabrics come in various types, each with distinct characteristics and applications:

  1. Cotton Interlock: Cotton interlock is a popular choice due to its softness, breathability, and absorbency. It is commonly used for making comfortable clothing items such as t-shirts, underwear, and baby garments.
  2. Polyester Interlock: Polyester interlock offers excellent durability, shape retention, and moisture-wicking properties. It is often used in sportswear, activewear, and outdoor apparel.
  3. Nylon Interlock: Nylon interlock is known for its strength, smooth texture, and elasticity. It is commonly utilized in swimwear, lingerie, and athletic garments that require stretch and recovery.
  4. Blended Interlock: Blended interlock fabrics are composed of a combination of fibers, such as cotton-polyester or cotton-spandex blends. These blends offer a balance of comfort, durability, and stretch, making them suitable for a wide range of applications.

Tips for Handling Interlock Fabrics

Working with interlock fabrics requires attention to detail to ensure optimal results. Here are some essential tips for handling interlock fabrics:

  • Pre-washing: It is recommended to pre-wash interlock fabrics to prevent shrinkage and color bleeding. This step ensures that the fabric is clean and ready for use.
  • Stabilizing Seams: Interlock fabrics have a tendency to stretch during sewing. To prevent distortion, it is advisable to stabilize seams with stay tape or by using a walking foot on the sewing machine.
  • Proper Cutting: When cutting interlock fabrics, use sharp scissors or a rotary cutter to ensure clean, precise edges. Take care to align the grainline correctly to maintain the fabric's stability and drape.
  • Choosing the Right Needles and Threads: Select ballpoint or stretch needles and use polyester or cotton-wrapped polyester threads when sewing interlock fabrics. These choices will help minimize skipped stitches and ensure proper seam strength.

Top International Users and Manufacturers

Interlock fabrics are widely utilized by renowned international brands in the textile industry. Here are a few notable users and manufacturers:

  1. HanesBrands Inc.: HanesBrands Inc., a leading global manufacturer of everyday basic apparel, utilizes interlock fabrics in their product lines. With a diverse portfolio of brands like Hanes, Champion, and Playtex, they cater to a wide range of consumer needs.
  2. Adidas: Adidas, a multinational sportswear company, incorporates interlock fabrics in their performance-driven athletic apparel. Their innovative designs and use of high-quality fabrics have positioned them as one of the top users of interlock.
  3. Polo Ralph Lauren: Polo Ralph Lauren, a well-known luxury brand, features interlock fabrics in their collections. Their commitment to superior quality and timeless designs has made them a prominent user of interlock in the fashion industry.
  4. Gildan Activewear Inc.: Gildan Activewear Inc., a leading manufacturer of basic apparel and activewear, utilizes interlock fabrics in their product range. Their commitment to sustainability and affordability has earned them a strong presence in the market.


Interlock fabric holds a significant place in the textile industry, offering a unique blend of comfort, stretch, and versatility. With its origins dating back to the industrial revolution, interlock has evolved to become a preferred choice for numerous applications. By understanding the various types of interlock, essential handling tips, and the top international users and manufacturers, textile professionals and enthusiasts can appreciate the intricacies of this remarkable fabric. As technology advances and fashion trends evolve, interlock fabric is sure to continue playing a pivotal role in the ever-changing landscape of the global textile industry.

A special type of eight-lock knit cloth. The stitch variation of the rib stitch, which generally resembles a double 1 x 1 ribbed fabric that is interknitted with crossed sinker wales. Plain (double knit) interlock stitch fabrics are thicker, heavier, and more stable than single knit constructions. The fabric has a smooth surface on both sides, and possesses good wearing qualities.
The stitch variation of the rib stitch, which resembles two separate 1 x 1 ribbed fabrics that are interknitted. Plain (double knit) interlock stitch fabrics are thicker, heavier, and more stable than single knit constructions.

Some other terms

Some more terms:

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The procedure, other than by scouring only, of improving the whiteness of a textile by decolourising it from the grey state, with or without the removal of the nature colouring matter or extraneous...

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