Includes: 2 PACK Mattress ReNew Air Support Systems, hand pumps, instructions, and patch kits.  Only 1 unit will be needed if your king size mattress is sagging in the middle, but 2 units will be most effective if you have 2 separate sags/body impressions far apart from the center. Follow the instructions for twin or full size to remedy 2 separate sags for a king mattress
 
Mattress ReNew is the ONLY fully customizable air support system designed to fix sagging and unsupportive mattresses. Mattress ReNew works for ALL innerspring, memory foam and combination mattresses, and works for all mattress sizes. Simply add air to the areas that your mattress is needing extra support and your mattress is like new again. It completely removes sags and dips and comes with everything you need. Our exclusive 12 chamber air support system is placed UNDER your mattress and will bring your saggy mattress back to life in just minutes.