This X-BIONIC Running Shark Jacket High-Functional Running Jacket was made with very high-tech features that provide the athlete an optimal performance climate. For example, fresh air can be let into the interior of the jacket via AirIntakes so as to be distributed through a complex system of channels and bars around the body. This was moisture and stale air is carried out of the jacket keeping you you dry and feeling good. In addition, the symbionic membrane is wind and waterproof but doesn't constrict breathability in the process. It transports not only vapour but also sweat drops through the membrane to the outside. Plus, the Shark looks really cool and modern and almost out of a terminator movie if you're into that type of thing.