I have been using Pzizz with Shure 215 in-ear headphones. Combined with a standard sleep mask, it is comfortable for naps (20min to 1:30h).
The perfect companion for Pzizz would be a sleep mask with EEG sensors, blue light and integrated headphones. As it is, though, I am not aware of a single product on the market, which works as advertised. This goes double for the EEG sensors.