This top of the line UltraRest has all the features of the UltraRest HD, with an eXtreme edge for the die hard hunter! The new modern design and sleek styling of the UltraRest HDX offers eXtreme compatibility, versatility, and even custom colors! If you are the archer that demands nothing but the top of the line, with all the bells and whistles, then the new UltraRest HDX is for you!