Reading Clothing Labels: Fabric Composition, Care Symbols, and What They Mean

What's Actually on That Tag

Most of us snip out clothing labels the moment they start itching — but before you do, it's worth knowing what those tiny tags are actually telling you. In the U.S., the Federal Trade Commission (FTC) requires that most garments sold domestically carry a permanent label disclosing fiber content, country of origin, manufacturer identification, and care instructions. That's a lot packed into a little rectangle.

The fabric content line lists every fiber present at 5% or more by weight, in descending order. So a label reading "60% Cotton, 35% Polyester, 5% Spandex" tells you cotton is the dominant material, with polyester adding durability and spandex providing stretch. Understanding this blend helps you predict how the garment will feel, breathe, and hold up over time. For a deeper dive into how different materials perform day-to-day, see our guide to common fabric types.

Decoding Care Symbols

The pictogram system used on U.S. labels follows the ASTM D5489 standard — a set of symbols developed to communicate laundering instructions visually, regardless of language. Once you learn the five base symbols, you can read almost any care label worldwide.

• Washtub (with water) — Indicates machine or hand washing. The number inside, if present, is the maximum water temperature in Fahrenheit or Celsius. A hand dipping into the tub means hand wash only.
• Triangle — Addresses bleaching. An empty triangle means any bleach is acceptable; lines inside it restrict you to non-chlorine bleach; a crossed-out triangle means no bleach at all.
• Square with circle inside — Tumble drying instructions. Dots inside indicate heat level: one dot for low, two for medium, three for high. An X through it means lay flat or hang to dry.
• Iron — Dots represent heat settings (one = low/synthetics, two = medium/wool, three = high/cotton/linen). An X means do not iron.
• Circle — Dry cleaning. A plain circle means professional dry clean; letters inside give the cleaner specific solvent instructions. An X means do not dry clean.

When a symbol has a single horizontal bar underneath it, use the gentle cycle or reduced agitation. Two bars means use the delicate cycle. These nuances matter more than most people realize — common damage like shrinking and pilling often traces directly back to ignored care instructions.

Fabric Blends and Why They Matter

Pure natural fibers and pure synthetics each have trade-offs. Blends exist to balance those trade-offs in practical ways. Here's a quick reference for what common compositions signal:

• 100% Cotton — Breathable, soft, prone to shrinking and wrinkling. Machine wash warm is usually fine, but check for pre-shrunk labeling.
• Cotton-polyester blends — More wrinkle-resistant and faster drying than pure cotton; slightly less breathable. A workhorse for everyday wear.
• Wool or wool blends — Warm, moisture-wicking, and naturally odor-resistant, but often require cool water or dry cleaning. For home care guidance, see caring for delicate fabrics at home.
• Rayon / Viscose — Drapes beautifully but weakens when wet; hand wash cold or dry clean.
• Spandex / Elastane (Lycra) — Always a minority fiber (typically 2–10%) added for stretch. Avoid high heat, which breaks down elastic fibers over time.
• Linen — Naturally stiff but softens with washing; wrinkles easily, which is part of its charm. Usually machine washable on a gentle cycle.

Fabric composition also has a direct relationship to how clothing fits and moves — something worth keeping in mind when you're shopping. Our article on everything that affects clothing fit covers this in more detail.