The i-Run team says
Technologies
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Dri-Fit
This high-performance polyester microfiber material wicks sweat away from the skin and draws it to the fabric's surface, where it evaporates. The Dri-FIT material thus allows you to stay dry and comfortable during exercise.
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Nike Flex
Nike Flex fabrics stretch with your body, helping you perform at your best and never holding you back. Featuring Dri-Fit technology.