What is the most popular clothing item in Hollister?

I want to get my BF a a present for his upcoming B-Day, but I'm not sure what to get. He's always wearing Hollister, bcuz that's his favorite store. And I want to get him something that he likes. So can you guys list some items from Hollister that are like super popular for 14-15 year old guys? And please, links would be awesome! If you can, please give links for a whole outfit. Thanks in advance. Oh, and I know that links to Hollister show a bunch of clothing items, if you could please tell me which clothing item you are recommending, then that would be fab! Thanks again!