Iowa official people didn't know, but the "ANF" stickers that Hayden Fry put on Iowa's helmets from 1985 to 1992 (I think it was that stretch, not entirely sure) are supposedly going to be on the Hawkeyes' helmets today.
The specialists just came out. It looks like there's a small yellow sticker on the backs of all the helmets. If that's it, it's not the size that Hayden had on the helmets. There were almost as big as the Tiger Hawk. BTW, "ANF" stands for "America Needs Farmers." Fry put them on Iowa helmets to draw attention to the plight of midwestern farmers. This was about the same time as Farm Aid and that John Cougar song, "Scarecrow."
The NCAA eventually made Iowa remove the stickers. I swear, the NCAA is a secret society dedicated to buzzkill.
Jerseys, the Cyclones are wearing white jerseys styled after the 1977 ISU Peach Bowl team. They're also wearing the yellow helmets from those days. The Hawkeyes are wearing their home blacks.