Wide Application: Our Spa Head Pillow Replacement for Hot Spring/Watkins/Hot Tub Spa Parts. Compatible with Hotspot models (2015 - current): Relay, Rhythm, SX, Tempo, TX. Replaces Part number 77444. Perfect Designed: Newest style with reversible pillow insert that features a bevel that can be placed on the top or bottom for individual comfort. It adds both style and functionality to your Hot tub, and its ergonomic design follows the contours of your body, allowing you to enjoy an absolutely luxurious spa treatment in the comfort of your own home. Superior Material: .