This end drain drop-in is a modern masterpiece of simplicity and sleek styling. With a large interior and gently sloped backrest, this bathtub will provide years of bathing pleasure. The bubble massage air system delivers warm air bubbles to caress your entire body. The air system takes surrounding air, heats it, and infuses it into the bath, relaxing muscles and leaving you feeling refreshed. Customize the experience by adjusting the intensity from a soothing effervescent touch to a more spirited massage.