for all of you worried bout Under Armour making a "girlie" kit; Under Armour doesn't make any jerseys for the MLS, so throw that out of your heads.
As an American, i can say that Under Armour has a strong reputation for listening to what the team they're serving wants, rather than pulling a nike and just handing them some new something and expecting thanks. if you look at the jerseys they've made for american football teams, they're very very mindful of tradition and the style of a given team/university; OH, and as to that whole "form fitting" bit; again, they'll make the shirts whatever size and tightness the players want. UA is all about serving the players and club's needs, not trying to make a name for themselves by being flashy.
Final point; the guy who owns/runs the company is a former (american) football player who started the company to make better gear for ATHLETES, not to make money or be a corporate name. They want to make the best performance gear around, and I for one am very, very happy that THFC has decided to go with them.