For years I’ve had a helmet that I now know didn’t fit. Sore ears after an hour. When purchased the fitting was the sales person asking if I can pull it off my head. Different story with the service at Sportsbikeshop, fits like a glove, 1st ride was for a few hours and I forgot I had it on, no ear pain which I thought was just something you get. I did try the F70 in a medium and it was to tight so there is a difference between the F70 and F71 but the hour I spent in the shop trying on was well worth it. Just note I tried on in the shop then purchased online for the team, having the time browse at all option I found the same helmet in a different colour with £140 off. Great helmet, great service