Let's get straight to it — here's what actually matters on this one.

• Horizontal pulling across the upper back usually means the shoulder or chest measurement is too tight for your build.
• Vertical pulling near the center seam often points to insufficient room through the back panel, common in slim-cut blazers on broader frames.
• A blazer that restricts your arms from moving forward (like reaching for a steering wheel) is too tight through the back, regardless of how it looks buttoned.
• Structured wool blazers show pulling more visibly than soft, unstructured ones — softer construction hides minor fit issues better.

The fit-and-fabric-health takeaway: A pulling blazer restricts movement and traps heat exactly where wool already breathes the least — the back panel.

Next up: check out our guide on cotton vs linen for everyday wear.