Just taken delivery of a new lightweight harness in preparation for the Dolomites. Replacing my Black Diamond Couloir harness (240 grams) with a Camp Alp Race (68 grams)! Said to be the lightest harness in the world! Extremely compact, it folds down inside a special case to the size of a wallet. Should be fine for low grade via ferratas that I am likely to meet.
https://www.camp.it/d/us/us/outdoor/product/3395