How do synthetic fabrics like polyester fare in extreme heat conditions?

Synthetic fabrics like polyester are widely used for their durability and affordability, but how do they fare in extreme heat? Polyester has a melting point around 250°C (482°F), making it relatively heat-resistant compared to natural fibers. However, prolonged exposure to high temperatures can cause it to weaken, shrink, or even melt. Unlike cotton or wool, polyester doesn't breathe well, trapping heat and moisture against the skin, which can be uncomfortable in hot climates.

In direct sunlight or near open flames, polyester is also more prone to melting rather than burning, posing a risk of severe burns if it adheres to the skin. For high-heat environments, blended fabrics or specialized heat-resistant synthetics may offer better performance. Always check garment care labels and avoid exposing polyester to extreme heat sources like irons on high settings or open flames. Proper care can extend its lifespan even in warm conditions.