The spa that made Strong®. Our Strong Spas Premium Line is where strength and beauty meet. With innovative features like our foldaway steps & towel holder feature, as well as our patented lifetime warranted DURA-LAST® cabinet and DURA-SHIELD® HardCover you’ll enjoy unprecedented peace of mind as a Strong Spa owner. We’ve designed every feature with your relaxation in mind. From our ergonomically designed seating, to the location of our hydrotherapy jets, to the engineering, performance and efficiency of a Premium spa, you can own and enjoy the ultimate spa experience.