I have another sizing question. I've read all of the recommendations and still can't make a decision. I'm 6'4" and 165 - 170lbs with the majority of my height in my legs. Every other long underwear item I have fits great in a medium for my size but short for my height. Can you help?

Tech Specs:

Material:

[body] 80% CoolMax, 20% lycra; [support] 80% nylon, 20% lycra 

Waist:

double-reinforced waistband with flat draw-cord 

Pockets:

1 waistband key pocket 

Recommended Use:

running 

Manufacturer Warranty:

Lifetime