Cast
-Air splints have and had their place.
-they are unstable to some degree, as well as they have issues with air leakage, risk of compartment syndrome, etc,...
-walking one one........not really and option, due to risk of bursting, not to mention, no one should ever contemplate walking on a fresh fracture, unless its life or death......the risk of complications are too great.
- I fully back the infamous SAM splint, they are reliable, nearly indestructable, and work in a multitude of applications, lightweight,shall i say more?
-CPR mask
-google for Laerdal pocket mask
-top of the line/a little bulky/has a nice filter
also check micro-shield, nice alternative, decent one-way valve, no filter, yet compact and comes in a key chain case option