I made something similar to these Dog Ears out of some fleece. I sewed it into a couple of triangles that slide over the buckles and straps on each side. Works perfect. No more overheating from a full hat under the helmet and my helmet fits way better than it did when I tried the head band style ear warmers.
Originally Posted by
CliftonGK1
Rox makes a product called
Dog Earz which velcro right to the helmet straps and cover up your ears.
(Link goes to Bikeman.com; no affiliation, just a fave online shop of mine.)