RZ Mask - M2 Reusable Nylon Air Filtration Mask

QUESTIONS ABOUT SIZING?SIZING & FITTING GUIDE M2 MESH MASK: 1 Strap System The RZ® M2 Mesh is our second-generation design, and the most popular mask in our lineup. Like all RZ Masks®, it features our standard F1 filters, blocking 99.9% of particulates down to .1 micron in size. The M2 utilizes a highly breathable, comfortable, and durable mesh fabric construction that helps to keep you cool on even the hottest summer days. It features a single strap hook-and-loop closure, aiding in quick installation and removal of the mask. M2 FEATURES:+ Best-in-class filtration and comfort with 360-degree seal+ Washable and Reusable+ Breathable mesh material – cool and comfortable+ F1 Filters remove up to 99.9% of particulates down to .1 micron in size.+ Dual one-way discharge valves reduce moisture inside the mask+ Adjustable nose clip eliminates any fogging of your glasses+ Filter performance independently proven by world-renowned Nelson Laboratories+ Three sizes for personalized fit – Medium, Large, Extra Large EACH M2 MESH MASK INCLUDES:+ 1 RZ Mask®+ 2 F1 Filters+ 1 Storage bag MAKE SURE YOUR MASK & FILTER SIZES MATCH: Medium Mask = Medium FilterLarge Mask = Large FilterX-Large Mask = X-Large Filter   HOW LONG DOES AN RZ FILTER LAST? The life expectancy of the RZ Filter depends on many variables, such as; particulate exposure density, particulate exposure duration, and user breathing rate. With that said, below are our general guidelines – as the user will have the final call given your exposure. + 20-30+ hours of continuous use in heavy dust exposure to things such as; grain bins, off-roading, construction/demolition, etc. + 30-40+ hours of continuous use in light dust exposure to things such as; grain bins, off-roading, construction/demolition, etc. + 50-60+ hours of continuous use when protecting against allergens, pollutants, odors, etc.