Outdoor Research Interstellar Jacket
Lightweight and highly breathable waterproof protection.
Material 3-layer fabrics are waterproof/breathable by virtue of an advanced combination of shell fabric, waterproof barrier and interior fabric that are laminated together. The barrier is porous enough to allow body heat to escape, without allowing water from the outside in. These fabrics are very durable.
More details at www.patagonia.com