DetailsThis turtle neck scarf has a sewn in pocket for inserting filters to increase efficiency, reduce the likelihood of microorganism transmission and the inhalation of airborne contaminants. The scarf has a forming wire in the nose area to create a seal. There is rubber band with a drawstring on the top and in the back of the neck area to adjust for individual fit. This item comes with 3 disposable filters made of nonwoven Nano fabric with silver ions added. Laboratory tested to block 99.36% of airborne particulates and bacteria.