When the pool is filled to capacity (up to about 80 percent, accounting for water displacement), cut off the water and jump in! All supplies--pool, liner, filter, pump, and ground cloth--are included with the set. The pool's sidewalls are made of laminated 28-gauge vinyl (very puncture resistant) supported by two additional materials for superior durability. The bottom is made of sturdy 16-gauge vinyl. The pool's extra amenities include UV inhibitors to protect the pool from the sun, and an inflatable top ring that can be used as a cushioned grip or headrest. For water changing, or taking down after the summer, there's a large drain plug at the bottom that allows easy disposal of water. --Diane Beall Visit Seller.