Saunabox makes some of the world's best saunas. According to many, a cold-plunge goes hand-in-hand, so of course they've addressed that with the PlungeBox XL. Its large oval shape allows for full-body immersion even for larger athletes, instead of a simple barrel that allows for a dunk-and-go experience. With extra-thick insulation, easy setup, and high-quality materials to withstand years of trips, it's an excellent addition to any recovery routine.