With Covid, and my states mask mandate, I have been searching for breathable masks to wear for hiking and other athletic activities. These masks are perfect for that, and comfortable for all day wear as well. They are fit just right, with the flexible nose guard and the chin cup. And there's enough room in the ear loops, so they don't tug on the back of your ears. And they are lightweight and small enough that you can keep one in the pocket of your hoodie so you'll always have it with you.