Satisfaction Guarantee - If the mask does not fit or you are not happy with it for any reason, please let us know. We will try to replace it with a mask that is the right size or return the product in 30 days for a full refund.
The mask is designed to maximize the amount of air to move through the filters, while minimizing the amount of filter material needed. The two inserts hold the material in place by fitting into grooves on the inside of the mask.
Sizing - (Working on a better way to describe this) Using your fingers, measure the distance from the bridge of your nose to under your chin. A medium is close to 4.5 inches. Large is 4.7
Easy to Clean - After each use, the mask must be taken apart and washed with soap and water. Silicone rubber can tolerate temperatures of 450 degrees F, but the elastic has not been tested. It must be removed if the mask is to be sanitized with boiling water or an autoclave.
Filter Material - Included are 40 3.5 x 3.5 inch spares of melt blown polypropylene material (20 white and 20 blue). The blue material is water resistant and should go on the outside. It is suggested that two layers (1 white and 1 blue) be used to cover each side.
You don't have to buy more filters from us. This mask is made to work with a variety of material. Or you could buy melt blown polypropylene from eBay.
Elastic Bands - 2 elastic bands comfortably hold the mask in place. A slip knot on the right side of each band makes it easy to adjust the size.
No One Valves - The air you breath out is also forced through the filter material.
Weight - 5.5 oz.
Fit around the nose - The nose of the mask is made to hug the nose without the need for a metal band to keep it in place. The fit around the nose should also be tight enough to prevent air from escaping and fogging up glasses.
Material - The mask and inserts are made with food grade silicone rubber with added colorant.
Texture - These masks are made with 3D printed molds. These molds will leave some texture on the silicone rubber.
Hand Made in San Diego