# Interlock Knit — Boring Label Textile Glossary *Interlock is a double-knit construction that interlocks two layers of jersey, creating a fabric that's smooth on both sides, more dimensionally stable, and heavier than single jersey.* *Boring Label · boringlabel.com · hello@boringlabel.com* --- ## Understanding the Term ### When two layers become one. Interlock fabric is produced on a double-bed circular knitting machine. Two sets of needles knit simultaneously, and the loops from each bed interlock with each other — hence the name. The result is a fabric with identical smooth faces on both sides. Compared to single jersey, interlock is thicker, heavier, and more dimensionally stable. It doesn't curl at cut edges (a persistent annoyance with single jersey) and has less stretch. These properties make it popular for polo shirts, baby clothing, and garments where structure matters more than lightness. For t-shirts, interlock is less common because the extra weight and reduced breathability work against comfort in warm conditions. A 180 GSM interlock feels comparable to a 220+ GSM single jersey in terms of warmth. --- ## Why It Matters ### How interlock compares to single jersey. Understanding when double-knit makes sense. - **Both Sides Smooth** — Unlike single jersey (smooth face, textured back), interlock is smooth on both sides. This matters for reversible garments or when the inside touches sensitive skin. - **Dimensional Stability** — Interlock's double-layer structure resists distortion better than single jersey. It holds its shape more firmly through washing and wearing. - **Weight Trade-off** — The double construction adds weight. At the same yarn count, interlock is roughly 40–60% heavier than single jersey. For a summer t-shirt, that's a meaningful difference. --- ## Our Standard ### We chose single jersey deliberately. Interlock is excellent fabric — just not for what we're making. Our 180 GSM single jersey in Supima cotton delivers the breathability, drape, and lightness that a premium everyday t-shirt demands. Interlock would push the weight above 260 GSM at our yarn count — too heavy for year-round wear. - **180** GSM — Achievable in single jersey — would be 260+ in interlock --- ## Interlock knit — your questions, answered. Comparing knit constructions. **Is interlock better than single jersey?** Neither is objectively better. Interlock excels in structure and stability. Single jersey excels in breathability and lightness. The best choice depends on the garment's purpose. **Why do polo shirts use interlock?** Polo shirts need structure to hold the collar. Interlock's dimensional stability serves this purpose. T-shirts don't have collars, so the extra structure isn't needed. **Can you make a lightweight interlock t-shirt?** Yes, with very fine yarn. But at that point, the fabric becomes delicate and expensive. Single jersey achieves the same weight with standard yarn and better durability. **Is interlock knit more durable than single jersey?** Yes, for most measures. The double-layer interlocked structure of interlock fabric is more resistant to distortion, tearing, and runs (ladder formation). It does not curl at cut edges like single jersey. However, interlock is heavier and less breathable — trade-offs that make it better suited to structured performance wear than lightweight everyday t-shirts. **Can you tell interlock from single jersey by looking?** With practice, yes. Single jersey has a clearly different face and back — the face is smooth (V-shaped loops), the back has a horizontal texture. Interlock looks the same on both sides — smooth and stable. Interlock also feels firmer and denser when held. If you stretch a corner, interlock resists distortion more than single jersey. --- ## See It in Practice We considered interlock. We chose breathability. Free returns · 30 washes guaranteed · ₹1,299 **Shop:** https://amzn.to/3P2XaNk --- *© 2026 Boring Label. All rights reserved.* [Visit boringlabel.com](https://boringlabel.com) | [Email us](mailto:hello@boringlabel.com)