The inside of the shirt is roughened something is used for thermal insulation and also look good to the touch and contributes. The exterior, however, is relative. smooth, so you never get stuck when tightening the outerwear.
Even under heavy load the inside remains very dry and you do not have this feeling stuck in sweaty things. Besides making the tight-fitting shirts and a good figure and emphasize the defined body shape, so that they can actually wear without a little about it, especially because there are not only "black unit," but many great colors.
To name positive would also be of silicone bead on the inside of the waistband, as he is known by cycling shorts on the inner leg side, which prevents slipping of the shirt through the movement, whether directly resting on the skin or worn over trousers.
To run this shell is in conjunction with the "ColdGear Comp Evo" -Legging and the "Storm Run 1/4 Zip" in-bonnet winter the perfect combination, but also for sports cycling ideal, so that with even in colder temperatures a thin long sleeved or a thin jacket is tightened (as windscreen) above optimal.
Although things are not cheap, but definitely worth their money by the given function, the pleasant feel and appearance.