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Built to deliver excellent adaptability and climate control, the X-Bionic Shark Jacket offers both protection and breathability you demand during your training. The Shark is designed for optimal climate control, thanks to the built-in AirInTake that distribute fresh air through a complex system of channels and bars. This running jacket also provides unfettered arm mobility with anatomically tailored shoulder, improved range of motion with pre-formed elbows, waterproof seems/zipper/pockets, and many more.