What Fabric Is The Least Breathable?
What are the least breathable fabrics? Silk. Silk may be lightweight and comfortable, but if you drip even a drop of sweat onto the fabric… Polyester. Polyester is not breathable, like, at all. Denim. Spandex. Fleece, Velvet, or Down. Merino Wool. What is the least hot fabric? From shirts to dresses, stay cool this season …