Proven to Clean Carpets Better Than Dyson DC25 and DC41 For Less Than 1/2 the Price, the Suction Seal PET bag less upright combines Eureka?s exclusive Airspeed Technology with Suction Seal Technology for deep cleaning power on all floor surfaces. Suction Seal Technology with All-Surface Suction Plates concentrates airflow for deep cleaning suction power. As you move across carpet, hardwood or tile floors the plates raise and lower, creating a seal to maximize airflow for powerful cleaning performance. Whether it?s surface dirt or debris hiding in crevices, it?s sucked up and away without any scattering. Unlike other vacuums, Airspeed Technology has two smooth tubes, featuring limited bends and turns. This allows more air to pass through the vacuum. The direct air path from floor to cup decreases the distance for dirt to travel, which increases the amount of airflow for powerful suction. Eureka has engineered Suction Seal to provide maximum suction power longer than other types of vacuums. Based on a comparison between (a) regular MSRP of Eureka Suction Seal PET and Dyson DC25 and DC41 vacuums as of November 2011 (b) independent lab tests using industry standard ASTM F608 test, measuring embedded dirt removal from carpeting. When compared to conventional bagged and single stage cyclonic vacuums having dirt cup filters.