Face Mask Bird Design White Breasted Nuthatch Photo Reusable Cotton Face Mask,. 8 1/2 X 5" Curved construction to fit your face closely. These masks include a PM 2.5, which may already inserted into the mask . Our masks stack multiple layers of material, Outside Polyester, interior is soft 100% pre-washed cotton. The CDC has adopted a safety-first policy and is recommending everyone wear non-medical protective face coverings to help "flatten the curve"