Holding on to your pick for a longer period of time is sometimes not easy. This will help you keep your fingers from cramping.
They have an easy grip and do not need a lot of pressure to keep them in your hand
They are not just for guitar players, but can also help drummers hold on to their sticks and a lot more instruments.
It is a ultra thin design and does not interfere with your playing.
The fact that they stick to about every surface and are so thin is one of the things I like about them.
Made of Silicone means that they will not irritate your skin (unless you have an silicone allergy)