These are the Legend of Zelda Hyrule Leggings available from ThinkGeek ($25). They look great and I am super into them. And if I saw a girl at the gym wearing them I would still not talk to her because the gym isn't the place to talk to girls that don't want to talk to you (there's actually no place for that), it's the place to lift weights until you think you're gonna puke, then actually puke. Trust me, I got a free 1-hour personal training session when I joined.
Keep going for a couple detail shots including the embroidered Hylian crest on the back waistband (nice touch).
Thanks to Jules, who made me promise to buy her a pair. No, you buy me a pair! Okay okay, we'll buy each other pairs.