This running cap features the classic Swallowtail design with a grid structure on the skin-facing side for a lightweight feel and dryness. ■Color: Black ■Size: M ■Material: Swallowtail Recycled Nylon Doubleweave with DWR (100% nylon) ■Features: Ripstop nylon material with water-repellent properties Reflective logo Side mesh panel ventilation for excellent breathability Sunglasses hole ■Characteristics: Water-repellent coating Ventilation Equipped with ventilation in all models, linked to the PAC system (Physical Active Construction) and placed in a position that does not hinder movement and allows for stress-free operation during activity. Even when using highly breathable materials such as GORE-TEX, it can be difficult to sufficiently control the vapor from perspiration during hard hikes or when the outside temperature is high and there is little difference in water vapor pressure inside the clothing. Ventilation is essential to maintain a constant internal environment and prevent a drop in body temperature and the resulting decline in physical strength by actively expelling vapor. GREEN MATERIAL / Materials that reduce environmental impact, such as recycled materials and plant-derived materials.