Medical Mask Material for Sale ! Available colors Blue-Black-Red. Inner layer : Material: polipropylene non woven Weight: 20gsm Color: white Middle layer: Use Medical filter from pp nonwoven fabric to effectively isolate the ash layer. Weight: 25 gsm Color:Blue-Red-Black Outer layer: Waterproof non-woven fabric to effectively isolate salvia Material: polipropylen non woven Weight: 25gsm Color: white Free from: latex, addditifs, fibres Filtaration efficiancy(EFB%)â¥95% Preassure (Pa/cm2): <40 Microbal clean(cfu/g: â¤30 Nose Clip: Form full plastic (PE) Mask Belt: From elastic gums. Cotton rope