Is polyester waterproof?

To summarize the various answers: and correct some: Polyester as a material (like a block of solid polyester) is waterproof because it is a continuous, homogenous material. read more

Polyester is a resilient fabric with excellent color-retaining capabilities. However, the fabric's disadvantages include retention of body heat and a lack of breathability. The fabric is soft and comfortable to the touch, and caring for the fabric is simple. read more

Polyester as a material (like a block of solid polyester) is waterproof because it is a continuous, homogenous material. However, polyester is a bit hygroscopic: it will absorb a small percentage of water molecules when subjected to high humidity. read more

The most common fabrics are nylon and polyester, which are measured in Denier. Denier is based on a natural standard: a single strand of silk is approximately one denier. So 400D means one of these fibers in a 400D fabric equals roughly 400 pieces of silk thread. read more