Their are many good websites for how - to's on making period clothing but the best one I've found so far for accuracy to the period and good background info is reconstructinghistory.com

This weeks article, Celtic Renaissance Clothing is about the Leine, which would be perfect for men or women and could be made in light weight fabric for use during hot weather, or wool for cold. The sight above has a great selection of patterns for sale to make lots of different period clothing, including a leine.