Huge variety of choice, so many brands, so many designs.. it can be overwhelming. The good thing when it comes to climbing apparel is that the only thing that matters is comfort and design if you will. You need to be able to move freely and not get annoyed by a restricting material or too loose/tight clothes. The design then is totally up to you! Hoodies are ideal to wear in-between boulders / routes when taking a short rest so you don't catch a cold. It always gets fresh in the fridge part of Berdorf or Magic Woods in Switzerland for example which is where hoodies are life savers, even during the summer days.