During intense running, the thumbs slipped through the openings keep the sleeves in one position even during sudden movements. The special design of these cutouts prevents the fabric from slipping during changes in pace or direction. In practice, every dynamic swing of the arms does not cause the sleeves to roll up, allowing you to focus solely on your training.

The partial zip opening instantly increases air flow during vigorous movement. By adjusting the degree of opening, the user precisely controls the influx of fresh air in response to changing training pace or ambient temperature. At the moment of preparing to go out or quickly returning from an activity, the zip significantly speeds up putting on and taking off the sweatshirt.

During effort, the breathable material actively supports the regulation of body temperature, allowing for efficient airflow. The thoughtful construction promotes the removal of excess heat from the skin's surface to the outside. During intense movement, a stable thermal environment is maintained, even when training lasts for an extended period.