I am a skeptic when a hair product advertises it helps put moisture back in...

I am a skeptic when a hair product advertises it helps put moisture back in hair and calms down frizz. I have extremely course wavy hair that turns to frizz as soon as June in Memphis comes and it stays that way until October no matter what I do. As for the rest of the year I am highly active (run, cycle, various exercise classes)and anytime I sweat my hair is uncontrollably frizzy. This sounded too good to be true and was a bit pricey but I decided to give it a go. I am a convert!!! Love my hair now. It is truly amazing. The real test is coming in the next few months when we have 1000% (not a typo) humidity but fingers crossed it continues to wow me.