This trail running long sleeve base layer combines advanced moisture-wicking and antibacterial materials to keep you dry and odor-free during high-intensity activities. The FROGAERO ventilation system features strategically placed openings that automatically adjust based on body heat, opening during activity for cooling and closing at rest for warmth retention. Designed with a performance-oriented fit, the garment includes finger holes at the cuffs for secure positioning and reflective elements for low-light visibility.