Shark Navigator Upright Vacuum for Carpet and Hard Floor with Lift-Away Hand Vacuum, Pet Tool, HEPA Filter, and Anti-Allergy Seal (NV352), Lavender. Due to the tremendous suction of the Shark Navigator Lift-Away vacuum, the suction release feature has been added. This allows you to adjust the amount of suction to optimize push and pull on high-pile carpets and area rugs. For instance, if you’re cleaning a small area rug and it is being pulled up by the floor nozzle, simply turn the suction release collar located at the base of the handle to the right to release excess air from the unit. This will lower the amount of suction at the floor nozzle, making it easier to push and pull the vacuum while still getting your carpets clean. When you need maximum suction or when using the turbo brush, ensure the suction release collar is turned all the way to the left. We recommend you use the suction release feature on small area rugs and delicate fabrics.