Engineered for high-intensity year-round activities, Ventilator is a unique two-sided fabric with horizontal venting channels that push excess heat and moisture to the surface, allowing for quick cooling evaporation while providing sun protection. The new Ventilator fabric is the lightest and most packable fabric available, offering breathability, a lightweight feeling, and UPF protection. From working out to climbing mountains, this underwear has been fabricated to not only be dependable but also extremely comfortable.