This 3D washable mask can be used year-round, from autumn/winter to spring/summer. ★ Made of urethane and polyester for a cool, refreshing feel. ★ Thin fabric makes it easy to breathe, perfect for summer running and exercise. ★ An essential hygienic mask for virus protection, pollen, dust, particulate matter, PM2.5, and influenza prevention. ★ Can be used in all seasons. ★ Soft, stretchy urethane material is gentle on the ears, and is a free size. ★ Can be washed by hand with water or a mild detergent and air-dried for repeated use.