ultra-soft, ultra-smooth fabric that feels comfortable across your face and clings to your skin well. They're also reversible. While it's my most comfortable mask, it's not as breathable as a cotton mask, so I wouldn't recommend this to do strenuous activities in. It's also a bit large (and I have a large head and face so it works), but you can adjust the fit with the included cinching beads
Material is super comfortable and breathable even after wearing it for long hours.