Choosing a sport shirt supplier starts with fabric evidence, not attractive catalog photos. Ask for fiber composition, fabric weight, knit structure, and test reports for every proposed material.
Textile Exchange’s 2024 Materials Market Report states that polyester represented about 57% of global fiber production in 2023, while cotton accounted for roughly 22%. These figures show polyester’s scale, but volume does not guarantee performance.
For training shirts, compare moisture management, drying speed, breathability, stretch recovery, pilling resistance, and colorfastness. Request samples in the actual fabric, not a similar substitute. Test them after repeated washing.
A shirt may feel smooth on day one and develop pills around the shoulders after several sessions. Check shrinkage in length and width, especially for blended fabrics. ISO 6330 provides standardized domestic washing procedures, while ISO 105-C06 supports colorfastness testing after laundering. Reports help, but independent testing is more reliable than supplier claims alone.
Tips:
Build a simple scorecard. Record GSM, fiber percentages, wash results, seam strength, and rejected samples. Ask whether recycled fibers have chain-of-custody documentation.
Textile Exchange reports that recycled polyester remains a small share of total polyester production, so “recycled” should never be accepted without proof.
One practical mistake is choosing the lightest fabric to reduce cost. It can become transparent, weak, or uncomfortable under sweat. Recheck the decision with athletes, because laboratory comfort and field comfort are not always identical.