The Pro-Force M.50 Pack from Highlander Outdoor is in stock right now at Military 1st... "Pro-Force M.50 Pack has a 50L capacity and features a spacious main compartment with inner mesh pocket, 2 external front compartments and one utility pocket on each side. Moreover, there is durable MOLLE webbing throughout, nylon loops at the base of the pack and shoulder straps and extra D-rings intended for attaching additional accessories. Further, side compression straps allow the volume adjustments.

More choices of Full Face Masks designed like the tactical gas masks as there's an M50 Style gas mask available at RSOV.com. Called the ZUJIZHE M50 Dual Anti-Fog Fan Ventilation Full Mask that, as its name suggests, has two fans installed in what are supposed to be conformal filters. These two fans need 2 AA batteries (each fan) which should be enough to blow the fog away and cool your face.