I have patello-femoral syndrome (my kneecaps wander out of the groove nature made for them). I have gone through physical therapy twice. They showed me how to use this tape when I run, play tennis, or take a long hike. Without it I am in pain for days. The combination of the two tapes keeps my kneecap where it belongs. The white tape goes on first, putting a little tension on to pull each knee-cap towards the center. The leukotape should not go next to your skin. You put it on top of the white tape, and use it to pull your knee-cap towards the center more.
(*** The PT said it is not good to use it all the time, for the muscles get weak that are supposed to hold the knee-cap in place. I still do my PT exercises). 5 stars

My daughter plays volleyball for UCSD. She required taping for a previous injury, and the school's training facility was out of this kind of tape. More was on order, but hadn't arrived from their source. I ordered the tape, from Amazon, and it was delivered the next day, just in time for the team's next travel match. The trainer was very impressed. So was I. Thanks for such great service! 5 stars

The tape combination works great and was recommended by Physical Therapist. This is the same tape that she used. 5 stars