Not much beats kicking back in a hammock, unless it’s a hot tub. Or better yet, both combined. The Hydro Hammock merges the two thanks to the use of a synthetic high-tensile strength fabric that’s solid enough to support the weight of two adults plus up to 50 gallons of water. Set it up between two solid trees or a hammock stand, fill it up with water, install the optional LP gas water heater system, and enjoy. It also comes in single or double layer versions, the latter of which is compatible with an insulation pad for winter use and can be filled between the layers for turning it into a hammock water bed.