TotalDry Surgical mask with ear loops and a enclosed, malleable nose bar for snug, comfortable fit.One size fits all. Class one flammability. Filtration efficiency: BFE >99% 5.breathability-delta P: 2.3-2.4mmH2O/cm2. Composition: 25gsm spun bonded non-woven outer and inner layer, 25gsm melt blown non-woven middle layer. Latex-free.