You don't need to be the next Wim Hof or that guy with a surprisingly involved morning routine to know that the best cold plunges are all the rage in the wellness-sphere these days—but what qualifies as a “cold plunge,” and are cold plunges actually good for you? At its simplest, cold plunging is the act of submerging yourself in frigid water. However, if you want consistent access to high-quality cold water immersion from the comfort of your home, look no further than our picks for the best cold plunges below.