# Answers | The Fabric Files

Source: https://thefabricfiles.com/answers/

Direct answers to the questions readers ask most.

[Is cotton or polyester better for everyday clothes?](cotton-vs-polyester.md)

Cotton for breathability and feel against skin; polyester for durability, stretch recovery, and price. Blends split the difference.

[Why do sweaters pill, and can you prevent it?](why-sweaters-pill.md)

Pilling is loose fiber ends tangling under friction. Longer fibers and tighter knits pill less; a fabric shaver fixes what forms.

[What does GSM mean in fabric?](what-is-gsm-fabric.md)

Grams per square meter - fabric weight. Higher GSM means thicker, more durable fabric; for tees, 180-220 is the quality zone.

[Are linen wrinkles a defect?](linen-wrinkles-normal.md)

No - wrinkling is intrinsic to flax fiber. It is the accepted texture of linen, and only sharp creases at seams need pressing.

[What does momme mean in silk?](silk-momme-meaning.md)

Momme (mm) is silk's weight unit - 19-25 momme is durable for shirts and pillowcases; below 16 is delicate.