The PoolStyle Winterizing kits are effective and safe for all types of pools. The PoolStyle 2-step or 3-step Winterizing System is easy to use and will help provide clean, clear, and easier, quicker reopening next Spring. Dual-action and triple action available for different size pools. Kit includes: 2lb. Non-Chlorine Shock 2lb. Wintering Powder 2 qt. Winter Stain & Scale