What is this enclosed bathtub pod called that rids of all your body senses?

What is this enclosed bathtub pod called that rids of all your body senses?
Sensory Deprivation Chamber
Hey, I've heard of this enclosed bathtub that when you're inside, you're numb of all your body senses. It's pitch black and very soundproof. The water temperature is the same as your body heat, that way you feel like you're sort of floating. I think it's used for therapy and ultimate relaxation.

Anyone know what I'm talking about?! What is it called? I googled based on its description, but haven't found anything.
Thanks!

---

Orignal From: What is this enclosed bathtub pod called that rids of all your body senses?