Found out about this product from a friend who offered it to me prior to an 18k trail run.  Loved it so much I was ordering it almost the next day.  Since then I have used it for several runs and even used it for my mountain biking rides.  I love the way that it coats the foot and allows it to find a natural flow with the socks and shoes.  It works well with my merino wool socks as it seems to elevate the best of the best.  This product works so well that it allows you to focus on the activity without having to worry about your feet.....