Elastic components can have care restrictions different from the main fabric. A predominantly cotton item may still contain a waistband, trim or print that limits heated drying.
Understanding this situation
The complete garment label takes precedence over assumptions based on fibre percentage. A continuous programme chosen for cotton can therefore be unsuitable even if the washing portion looks appropriate.
A useful next step
Sort before selecting both stages. If stretch or fit changes, record the garment construction and dry setting alongside the wash temperature. Use the stated alternative drying method rather than repeatedly trying lower or shorter machine cycles without permission.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.