These VEVOR pool lounge chairs are water-weighted in-pool loungers designed for tanning ledges and sun shelves in shallow water up to 15 inches deep. Built from durable LLDPE/PE material, they are made to resist UV exposure, chemicals, and aging for long-lasting poolside use in saltwater or chlorinated pools. The ergonomic S-shaped profile and smooth seamless surface provide full-body support, while the included headrests add comfort for relaxing in the sun. Fill the loungers with water to anchor them in place and help prevent floating.