Crocs sizes are so off. They are super small. Spend the money if you are serious about your training. Tres confortable, j adore The mesh is really nice and feels good even in hot weather - much more so than comparable packs Ive used in the past. Since they were so inexpensive and were purchased strictly for water play I don?t mind. In fact they were very precise. 1/8" jacks for each, but you can get a USB adapter/sound card these days for a few bucks (is what I often use). You should know that if you have roof accessories that mount in the channel grove of the crossbars, the channel on this on is a bit narrow. Installation was fairly easy, not a lot of parts/pieces to worry about.