Turn your backyard into a swimming oasis with the innovative, year-round Bestway® APX 365™ above ground pool set. Created by industry veterans who are experts in durability, APX 365 pools are built with a combination of long-lasting materials and groundbreaking weather defense technology so you can make memories with your family for years to come!The first of its kind in the above ground pool market, APX 365 pools are equipped with Polar-Shield™ weather defense technology. You can set it up for family fun in the summer, then leave it up through the winter - no off-season storage needed! Polar-Shield protects the liner against outdoor elements, even in cold temperatures..Constructed with corrosion-resistant galvanized steel, this pool is built for longevity. The frame is made from 100% steel, which is then coated in a layer of zinc to prevent rust and damage from the elements. The ClickConnect™ joints make setting the pool up a breeze, with no additional tools or accessories needed. The frame connectors also prevent metal-on-metal contact to ensure rust-resistance. The sturdy Tritech® liner is made out of an ultra-durable 3-layer material that is reinforced for strength and puncture-resistance. Tritech is 15% more tear-resistant, 33% more stretch-resistant and 83% more puncture-resistant than standard PVC, ensuring your pool will last summer after summer.This pool set comes with a sand filter pump, Polysphere™ pool filtration balls, a galvanized steel ladder and a pool cover. The Polysphere filtration balls are a lightweight, washable and reusable replacement for the sand needed to run the filter pump. Made of recyclable and non-toxic material, these cotton-like filtration balls can last 4-6 months with proper maintenance.