Weighing 46.5 pounds on its own, this HDPE lounger stays put in 5.5 to 8.5 inches of water instead of drifting off a tanning ledge. The contoured shell follows the curve of the spine so the back and legs stay supported through a long afternoon. HDPE resists sun, water and fading, while 304 stainless steel screws hold up against chlorine and saltwater.