My Master and I discussed hoods and vacuum beds today. Him and I both pointed out the same struggles mentioned above. Personally, I don't think I could restrict any air passages. We do breath play but only with his hand around my throat. I feel that his hand can be removed quicker and safer than any other thing.

I do think that if wearing a hood is a consensual and mutual desire, then the effort put forth is well worth it. It sounds to me like you are taking the small steps already to gradually work up to wearing it for long periods of time. I hope it adds to the erotic side of your play scenes and pleases your Master.

Happy hooding