When you know for a fact that airlines don't regularly clean their seats, you can just imagine how it can be a breeding ground for germs. So next time you travel, protect yourself by slipping on this seat cover that promises to kill off bacteria.

HeadDEFENDER creator Keely Watson shared with Travel + Leisure a disgusting experience that started it all. She recalled how she accidentally placed her hand on the top of an aircraft seat's headrest and felt disgusted with the "wet, sticky, and had a mucous-like consistency" something that was on the headrest. That awakened her germ consciousness and led to the creation of the personal seat cover.

The HeadDEFENDER seat cover protects travelers from going through the same disgusting experience. It also gives a new twist to the concept of flying safely. The seat cover is hypoallergenic and designed to be a "bacteria-killing shield" so it promises to kill 99.9 percent of "disease-causing microbes including MRSA and Staph." It comes in a pouch so it's easy to carry and travelers can choose from five different colors as well as two different sizes. The original size costs $17.99 while the shorter one costs $14.99.

Watson added that the HeadDEFENDER seat cover should come in really handy for travelers. She explained that flight attendants admit they "rarely clean seats" and that the airlines aren't even required to clean the aircraft on a daily or weekly basis. Some airlines "Airline companies do have standards and the plane usually gets a good cleaning at the end of the day, but between flights it is minimal."

According to CNN, website Travelmath.com conducted a lab study that revealed the dirtiest places on an airplane. A microbiologist tested 26 samples from five U.S. airports and four unnamed major flights. Airplane tray tables were the dirtiest with an average of 2,155 colony-forming units (CFUs) per square inch.