The cover is the feature that keeps a sandbox usable: tear-proof, waterproof oxford cloth keeps rain and animals out between play sessions, and it doubles as a ground sheet. HDPE panels molded to look like stone resist cracking and fading through a season outdoors. The 47" square frame gives a 38" x 38" sand area 10.5" deep, enough for up to four children aged three to twelve. CPC certified. Sand not included; net weight 23.5 lbs.