Towels are generally made from cotton or a blend of cotton and synthetic materials. While cotton has a higher heat resistance compared to some other fabrics, towels can still be damaged or negatively affected if exposed to excessive heat in the dryer.
If the heat in the dryer is set too high, it can cause the towels to shrink, become stiff, lose their softness, and even develop scorch marks or discoloration. In extreme cases, if the dryer is extremely hot or the towels are left inside for an extended period, there is a possibility that the fibers could begin to melt or burn.
To preserve the quality of your towels and avoid damage, it's generally recommended to set the dryer to a lower heat setting or use the "delicate" or "low heat" option if available. Additionally, you should follow the care instructions on the towel's label to ensure proper washing and drying procedures. If you want to be extra cautious, consider air-drying your towels instead of using the dryer.