In light of people getting used to no masks in Scandinavia, I was surprised to see the high compliance in yesterday's nearly full SK935 CPH-SFO given enforcement by staff at boarding only. The mid-section bathrooms were two rows in front of my seat, providing ample view for collecting statistics, and over the course of the eleven hour flight I noticed a total of about ten individuals not wearing a mask, all young men, ~17-35 years old.