There are a few assumptions people make that can trip them up.

• "100% cotton" means the whole thing is cotton. Not true. Trims, threads, and labels themselves can be different materials. It's about the fabric, not the entire product.
• Higher percentage of natural fiber means better quality. Nope. A 100% cotton shirt can be thin and flimsy, while a cotton-polyester blend can be sturdy and well-constructed. Fiber content is about feel and behavior, not quality.
• Fiber content is a guarantee of safety. It's not. The label tells you what's in the fabric, but it doesn't tell you about dyes, finishes, or chemicals used in processing. If you have sensitive skin, look for labels like "low impact" or "OEKO-TEX", but those are voluntary certifications, not required by law.
• If the label is missing, it's fine. In Australia, clothing sold to consumers is supposed to have fiber content labeling. If a label is missing or vague, that's a red flag. It might be a grey-market import or a manufacturing error. Ask the seller before you buy.