Delivering lightweight, packable warmth and superior breathability, the AT/C Thermoshell HZ is perfect for running in vastly-changeable, cool conditions, both on the trails and in the mountains, and during all different phases of dynamic and static activity. The use of super-lightweight Polartec® Alpha® insulation means runners can regulate their core body temperature and eliminate the need to shed or add extra layers while on the move.
It´s a great outdoor layer, really light and perfect for cold temperatures. It´s also good for windy conditions. It´s perfect to use for trail running races, because it´s light and thus not weighing you down. It fits very well and feels extremely comfortable.