These come highly recommended by one of the guys over at Carolina Remnant:
RZ Reusable Air Filtration Masks. The mask itself is washable, the filters are replaceable and are more efficient than the standard N95 masks (99.9% down to .1 micron as opposed to 95% down to .3 micron for N95). They do come in varying models and colors and in the Overstock section you can find some in Mossy Oak camo; these come with a "hunting filter" which conceals the scent of your breath, but the regular particulate filters will fit. I think the biggest plus would be that they're less likely to get mangled in a BOB than standard N95s.
Edit: They have a Father's Day sale going on: 25% off purchase and free shipping with code DAD25.
