composite sandbox

Most models use a removable cover to keep out debris and moisture plus a perforated or holed bottom liner (or a bottomless construction with a liner) to promote drainage and ventilation and let you adjust sand depth.

Several models include built-in corner seats (counts vary, e.g., 3 or 4). Descriptions list seat weight capacities in different models, for example about 110 lbs and 165 lbs.

Listings generally describe assembly as easy or quick and often require little or no extra tools. Common included items and aids are a detailed manual, slot connections or pre-drilled holes, ground stakes, and hook-and-loop fasteners for the liner.

Packages commonly include the sandbox itself, a cover, and a ground/bottom liner; some listings also note a user guide or instruction sheet.

Most listings specify HDPE (high-density polyethylene) for the sandbox structure. Covers and bottom liners are often made from Oxford cloth described as waterproof, non-fading, and tear-proof.