Elevation mask does it work?

No. It just makes you look like a doofus.

The limited research that has be done on live-low/train-high programs has shown no advantage to training at altititude except to improve performance at altitude.

http://tonygentilcore.com/2015/08/altitude-training-masks-helpful-or-hyperbole/

No they do not simulate the effects of low oxygen. No, they do not burn fat faster.

I thought Bain had joined the local gym when I first saw this.