I previously had a XL pre-ICE Xchange mask. It got stolen last Feb. Looking to get a new one. I've see my roommates new Foil Exchange ICE a size large and it looks the size of my old XL and fits like it. Have the manufacturing or sizing charts changed since the old models? My head exists on the borderline between L and XL on the sizing charts and i like any rear head coverage i can get. I'm wondering if this seemingly new size of XL is too big? Any help would be great.