I like to bike around in cooler weather, but my ears can get very cold in the breeze.At the same time, if I wear a stocking cap or winter hat under my helmet, I can overheat and my helmet can become too tight and uncomfortable. I also have a tendency to set down hats and whatnot in random spots, so I don’t want to worry about keeping track of a specific headband or buff.
A few years ago I made some earmuffs that can attach easily to a bike helmet – it attaches with velcro to the underside of a helmet to keep your ears out of the cold but also allows the top of your head to vent if you work up a sweat.It’s a semi-permanent solution that’ll be able to stay on your helmet for the entire cold season, but can be taken off and stored away in just a few seconds if it’s not needed for your ride.
The inside is a soft flannel, and the outside is ripstop nylon, or sometimes a specialty fabric.It attaches to the helmet via velcro and to the chinstrap with an elastic loop.