Good advice bluebird2! I got one that went from my groin to my knee cap in March driving back from Pittsburgh PA and then plowing for another 10 hours. Not getting into the whole story but blood clots is a serious issue that you do not want to mess with. I was down for almost a month and half, I had to cancel my turkey hunting trips and I'm blood thinner for the rest of my life. I just turned 41 a few weeks ago so that's not good.