Leather leggings- yay or nay??

I bought these amazing leather SWEATPANTS at a Derek Lam sample sale for $30 and am terrified of wearing them because I think they'll get ruined. According to the tag it says to take to a leather specialist: http://www.lyst.com/clothing/10-crosby-by-derek-lam-leather-track-pants-nude/

Once I'm done wearing them out they'll probably cost me retail with the trips to the "leather specialist."
We have this dry cleaning service in our building where we just put our dirty clothes in a locker, someone picks it up, and then delivers it back to the same locker. I don't know who the "leather specialist" is, but they only charge me $9.50/per pair.

I'm in Chicago, but I'm sure that in a place like NYC you can find a similar deal. Maybe go through Washio or another dry cleaning app? (They likely did all of the price shopping for you!)
 
yayyyy and I like the leggings from Wolford. I think you have to balance them with a cashmere sweater or coat, nothing revealing hair in a sweet ballerina bun with diamond or pearl studs.