While you can soak your feet in any tub and use your hands to massage your toes, foot spas with special features can do both at once with minimal effort, thanks to "many mechanisms like temperature adjustments, massage options and more," explains Marcela Correa, owner and medical nail technician at MediPedi NYC Inc. "Foot spas are typically used to soak and soothe feet, relieve pain or discomfort in toenails and soles of the feet and to prep feet for a deep cleansing or treatment." Based on interviews with foot care experts (including a podiatrist) and product evaluations by our editors, the Good Housekeeping Institute Beauty, Health and Sustainability Lab identified key features to look for in a quality foot spa, like heating, massage rollers, and jets.