A fibre-content label answers one question: what is this garment made of, and in what proportions? At a thrift rack that question matters because you cannot ask the maker, try a return desk, or assume the soft hand-feel in your hands will survive the wash. Read the blend first, then decide whether the material suits the use you have in mind.
Read the fibre list the way regulators require it
In the United States, most textile products must carry a label showing the generic fibre names and their percentages by weight, listed in descending order of predominance, along with the manufacturer or marketer identity and the country of origin. The Federal Trade Commission’s labeling guide for the Textile and Wool Acts sets out the details: fibres under 5% of the weight are generally grouped as “other fibers” rather than named, with an exception when a small addition has a definite functional significance, such as a little spandex for stretch. Wool is always named with its percentage even below 5%, and stated percentages carry a 3% manufacturing tolerance, so a label reading 40% cotton may lawfully reflect somewhat more or less.
Canada’s rules work the same way in substance. The Competition Bureau’s textile labelling guide requires the generic name and percentage by mass of each fibre at 5% or more, allows a 5% tolerance on blend disclosures, and requires the fibre information in both English and French. Its short summary confirms that unknown fibre content may be declared as unknown, undetermined, miscellaneous, or mixed fibres with a percentage.
Three practical consequences follow. First, the first-named fibre dominates, so “60% polyester, 40% cotton” and “60% cotton, 40% polyester” describe different cloths even though the numbers look similar. Second, “other fibers” hides the exact recipe, which matters if you react to wool or expect a specific behaviour. Third, a missing or cut-out label removes the only regulated statement of content you will ever get for that garment.
Turn the blend into a buying decision
The table below is our original decision method. It does not grade fibres as good or bad. It checks whether the stated material fits your intended use and your tolerance for uncertainty.
| What the label says | Question to ask at the rack | A reasonable decision |
|---|---|---|
| One dominant fibre above 80% | Does that fibre suit the garment’s job and your laundry routine? | Consider buying if construction and fit also pass |
| A balanced blend, no fibre above 60% | Are you comfortable judging the cloth by feel and inspection rather than by a fibre name? | Buy on condition and construction, not on the percentages |
| A small stretch addition, such as 3 to 5% elastane or spandex | Is the elastic still lively when you gently stretch and release it? | Pass if the stretch is dead; tired elastic cannot be revived |
| “Other fibers”, unknown, or mixed fibres | Can you accept not knowing the exact recipe, including possible wool? | Buy only at a price that survives the uncertainty |
| No label at all | Is there any other way to verify content, such as the maker or a cleaner? | Investigate first; a missing label is never a discount |
Notice what this method refuses to do. It never converts a fibre name into a quality verdict. A 100% cashmere sweater with popped seams and thinning elbows is a worse purchase than a well-sewn 50/50 blend in solid condition. Pair this check with our guide to checking clothing construction, which covers the seams and finishing the fibre label says nothing about.
Walk through a hypothetical comparison
This example is hypothetical, with invented garments and prices, to show the method rather than report market facts. Two sweaters hang side by side, each tagged C$14. One reads 100% lambswool; the other reads 55% acrylic, 40% polyester, 5% other fibers.
Start with order and thresholds. The first sweater’s single fibre tells you the care routine will be wool-like, so check our care-label guide next and confirm you will actually hand-wash or dry-clean it. The second sweater’s “other fibers” line means up to 5% of something unnamed, so anyone with a wool sensitivity should treat it as unknown. Then inspect both identically: stretch the cuffs, sight along the seams, check for thinning under the arms, and look inside for a maker name you could research.
Suppose the wool sweater pills heavily and one cuff is sprung, while the blend is structurally sound with lively hems. The fibre names alone would favour the first; the full inspection favours the second for everyday wear. That is the point of the method: percentages inform the decision, and condition and construction close it. Record the actual label wording in a photo either way, since “felt like wool” is not evidence later.
Finish with care, then check the value
Fibre content and care instructions travel together. A blend you cannot wash the way you live becomes a garment you avoid wearing, however attractive the percentages looked in the store. Run the label through the find checklist alongside fit, condition, need, and repair effort before committing.
If everything else passes and you want market context, ThriftWise provides estimates beside active eBay asking-price comparisons. Those listings show what sellers ask, not completed sales, and a fibre label never proves value on its own. Buy the material you can look after, in a garment built well enough to deserve it.