Montbell Wickron Cool Field Mask Reusable with 1 repacement field maskA highly efficient all season mask for protecting against breathing in pollen, dust, and other fine particles while hiking or cycling. The mask is made from exceptionally breathable material for unhindered breathing, and in addition to conforming to the contours of your face, the plastic stuffing in the piece that fits to the shape of your nose prevents glasses or goggles from fogging up. The main fabric also has a deodorizing filter to prevent odors