{COLD BENEFITS} Regular cold exposure drastically increases dopamine, endorphin & norepinephrine levels, resulting in instant boosts in energy, alertness & happiness. Also promotes blood flow, muscle recovery, weight loss, skin / hair health, & more. {TEMPERATURE INSULATION} Solstice's revolutionary inflatable dropstitch tub creates a protected, insulated pocket of air that helps stabilize water termperature within the tub. This effectively keeps your water hot or cold depending on what you want. {INLET OUTLET CONNECTION POINTS} Integrated connection points serve as drain valves, but also used to pair with additional accessories like water filters, chillers, heaters, garden hoses and much more. Accessories sold separately. {EXTRA LARGE DESIGN} Its deep 30’’ design perfectly accommodates people of all sizes. This tub allows you to lie down during therapy, unlike common standing options, which is necessary for optimal performance. Can comortably fit people 6+ feet tall. {INCLUDED LID} The Solstice Plunge Tub comes with an insulated inflatable lid with integrated carry handles and a buckle lock system - every feature is carefully designed to optimize user experience. Designed to hold both hot or cold water.