There is an article describing a study done on players wearing half shields and full shields in the Journal of the American Medical Association. It's very long, and you'll need to pul out your statistics textbooks. Clay http://jama.ama-assn.org/issues/v282n24/full/joc90454.html HOCKEY-L is for discussion of college ice hockey; send information to [log in to unmask], The College Hockey Information List.