Jacket sleeves can be pushed up for prepping, and still hang down so far that the prepped area gets contaminated. I am not an advocate of jackets while prepping. I understand the dead skin side of the story, but my bare arms are not over the sterile field. If I'm scrubbing, my arms are covered. The AORN, and medline I believe, is now introducing a long-sleeve scrub that can be worn in the OR. (No, I'm not a rep, or have stock, etc, but I really do like the idea of those scrub tops for the circulators, over pushed up jacket sleeves.)