This is the "KANAVAL E3" sports mask from Naru Mask. It's designed for all outdoor sports, such as cycling, running, and climbing. It removes pollen and harmful substances from the air, allowing you to breathe in fresh air and supporting your performance during exercise. It has a heat retention effect and UV protection. The mesh material is breathable and makes it easy to breathe. It can be worn in various ways, including as a neck gaiter, scarf, mask, or full face covering.