Listed as number five in this article for Superior Sleep: https://blog.parachutehome.com/gifts-for-sleeping-better/
5. For Your Try-Anything Chum
If you only know about sensory deprivation tanks from sci-fi shows like “Stranger Things,” you’re missing out. Since the 1970s, float tanks – dark chambers filled with salinated warm water you float in to relax and escape — are said to foster clarity and creativity. Most report that a 60-minute float does wonders for that night’s slumber, but if you’re shopping for a more adventurous type, look into an all-night sleepover session for an unforgettable experience. Depending on your location here are a few options: Float Lab in Venice Beach; Reboot Float Spa in San Francisco; Float 60 in Chicago; Lift/Next Level in Brooklyn