I did a bit of research professionally on these a few years ago. There are a couple of important thing things to keep in mind when looking for an emergency fire evac mask/hood. 1) they are definitely single use items, 2) hoods are generally better than masks since they do not require fitting, they can handle facial hair, and they will protect your eyes and face from smoke. 3) they are only as good as the canister attached. These MUST be rated for particulates and most importantly, CO2 Finally, they do go bad.
I’m generally partial to safety gear that has been tested to a recognized standard, and given the importance of respiratory protection in a fire situation, I will only spend my money one that can provide verifiable test info. Professionally, I ended up settling on the iEvac hood by Elmridge Protection. Never tested it in a fire personally, however.