[RC-Monster Mike]

I don't think the material is necessarily fire retardant, but it isn't flammable, either. The actual packs are almost sealed within the module, too - not much air = not much fire. The packs could be wrapped in flame retardent material by the end user easily enough - that is up to the end user though. The pictures don't show it, but the 1/16" thick sidewalls completely wrap the packs and are sunk into the sidewalls on the upper and lower pieces(there is a recessed shelf on the upper and lower pieces for the walls to sit on). These modules were made to these specific packs, so the packs are snug and the top and sidewalls are also snug(with 1/16 foam pad on top of packs) so nothing moves. About 5 minutes with rtv silicone or shoe goo and the packs could be completely sealed from the elements. With proper care and charging/discharging, the chance of a fire is quite slim. They will mount semi-permanent on my bike as well(off road machine, so they need to mounted securely) and I really don't want to burn my bike(or my manhood) any more than anyone else. I am not terribly worried, though.