The trail running collection was created with running in demanding, natural terrain in mind. The clothing from this line is characterized by lightness, technical materials, waterproof finishes, and light insulation, which provide comfort even during long distances. The 4F running hoodie provides comfort and functionality in changing weather conditions. It has a regular fit, which comfortably adapts to the silhouette. The material used, Primaloft Active, is an ultra-light insulation that simultaneously insulates and allows the skin to breathe. It effectively wicks moisture during intense effort. 4FWarm technology supports maintaining thermal comfort.