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

• Thinning or slightly see-through patches, especially at friction points like elbows and inner thighs, signal fiber breakdown.
• Persistent pilling that doesn't improve after a fabric shave usually means the fibers themselves are degrading, not just surface fuzz.
• Fabric that feels noticeably rougher or stiffer than when new has likely lost natural oils and finish through repeated washing.
• Once a fabric thins significantly, it also loses some of its original breathability and structure — a comfort issue, not just a durability one.

The fit-and-fabric-health takeaway: Worn-out fabric doesn't just look tired — thinning fibers change how the garment breathes and feels against skin.

Next up: check out our guide on how often you should actually wash your jeans.