KILPI COMBO-W comes with a unique novelty in the form of a seamless knitted knit, which in combination with flat seams eliminates abrasion and offers freedom in sporting performance. It features ventilation zones that offer great breathable properties along with a fast-drying material. The T-shirt has anti-slip silicone prints at the end of the sleeves to prevent them from rolling up. The knitted fabric includes three practical back pockets and a small little pocket on the sleeve for smaller objects. It also includes silicone prints on the shoulders that prevents slipping of, for example, running jackets or a backpack. A reflective zipper makes dressing simple. The material used in production eliminates temperature differences during the day and at night. The T-shirt is therefore suitable for extreme sports, such as trail running through the mountains.