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Fabric flutter is rapid airflow-induced flapping in lightweight sportswear that can affect comfort, noise, drag and garment stability.

Surface texture, seams and garment fit can change airflow around polyester sportswear and influence aerodynamic drag at higher speeds.

Strike-through measures how quickly liquid moves away from the skin side, while rewet indicates how much moisture returns under pressure.

Repeated stretching can gradually weaken polyester fabric even when no tear is visible, making cyclic tensile fatigue important for high-movement garments.

Thermal diffusivity describes how quickly a temperature change moves through polyester fabric, influencing transient comfort and heat response.

Wet cling is the uncomfortable sticking of sweaty polyester fabric to skin. It depends on liquid films, fabric structure, fit, airflow and moisture-management finishes.

Repeated twisting can gradually change polyester fabric structure, causing distortion, reduced recovery or shape-retention problems in performance garments.

Thermal effusivity helps explain why some polyester fabrics feel cooler or warmer at first touch even when their GSM is similar.

Polyester mesh inserts can improve ventilation and design contrast in activewear, but their stretch and recovery may differ from the solid body fabric. A seam joining these materials can ripple, pull or tear if the construction constrains one fabric more than the other.