2600 Particulate Respirators, N95, NIOSH Certified, Medium/LargeHandyStrap with buckle allows the respirator to hang down around neck when not in use Stretch cloth strap feels cool and comfortable against the skin Contoured nose bridge with soft foam nose cushion allows all day comfort Dura Mesh shell resists collapsing in heat and humidity Softspun lining for added comfort and durability Available in two sizes to fit most workers NIOSH certified to have a filter efficiency of 95% or greater against particulates