Bluetooth sleep masks block out light and let you stream audio. I spent weeks testing some of the top-rated ones on the marketThe best sleep masks in the US: I spent nine weeks testing 32 masks, and these are my favoritesSign up for the Filter US newsletter, your weekly guide to buying fewer, better thingsMy sister has fallen asleep to the dulcet tones of Law & Order every night for years. I myself am partial to the