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Polychromelab fabric is a three-layer waterproof-breathable fabric with a unique climate control system. The fabric is designed to be reversible and uses a black application on one side and a silver application on the other. The different colors work with external and internal conditions to cool you down or warm you up. Firestorm? Nuclear winter? The reversible Polychrome jacket can keep the body cool or warm. In cold, the silver lining of the laminate reflects body heat, while the black exterior absorbs warming UV rays. Turned inside out, the jacket has the opposite – Very pricy with an expected RRP of 650 dollars :/