The fabric on my previous XO brand supporter was wearing out after about 10 years of use, so I bought this shock doctor as a replacement since amazon doesn't have XO.

I took a good kick yesterday, but not even close to full strength. It was one of the worst shocks my groin has ever had. BioFlex is a bad idea.

Apparently my Krav Maga instructors bought a bunch of these to sell a while back and had to return them, because they just don't work. Wish I had known that ahead of time. Now they sell some other type of Shockdoctor cup that doesnt flex.

I've laughed at guys in the past that couldn't take a modest kick to the balls from my foot, and told them to find a cup that works. This time I was that guy. Don't let this happen to you, avoid BioFlex.