There are a lot of ways to stay dry
Many waterproof fabrics have a thin plastic or rubber film glued to the inside of the fabric. These plastic layers give fabric an unpleasant stiffness and also reduce breathability.
The Postalco Shear-Dry nylon water repellency treatment is fused directly into the fabric.
No films or plastic sheets are glued to the Shear-Dry nylon giving Shear-Dry its special flexibility, softness and breathability. Since Shear-Dry nylon is treated inside, outside and between the fibers, the treatment is much more durable than traditional water resistant treated fabric. Blocks 95% of UV rays.