X Series With its long list of standard features–including our exclusive SPX PR25 Performance Package, Performance Shield, low-profile sport console, black anodized rails and deck trim, hydraulic steering, docking lights, a third tube and more –it’s easy to see why our X Series is one of the most family-friendly options on the water. It’s also one of the greatest values afloat. X Series ULZ The Sylvan X Series ULZ layout features the ultra lounger, offering four different lounging positions to match any moment on the water. Easily adjust the setup for cruising, relaxing, or socializing with friends and family. It’s a highly versatile design built to deliver maximum comfort and flexibility all day long.