These fabric masks are made with 100% prewashed cotton fabric. The interior and exterior fabric are both a tightly woven cotton poplin fabric (think bed sheet fabric). There are elastic loops to hook over your ears comfortably, as well a small piece of wire sewn into the nose piece to keep the mask close to your face, and if needed, help keep your glasses from fogging up. The mask is open on both ends to allow you to place a filter in the mask if you want to.
These masks are designed to be washed and reused. They can go in your washing machine and dryer, but please note, dryer heat and shorten the life of elastic under heavy use. Also, the metal in the nose piece will get hot in the dryer. You can boil/sterilize these if needed for a medical setting.