The Nano Tips solution is like a nail varnish which you can paint onto the outside of your leather gloves to form a capacitive touch pad. This means you can use your glove covered hands with your touch screen phone or iPad.
I’m not recommending trying to use your phone while riding but it’s certainly more convenient being able to enter gps destinations or changing a music playlist when briefly stopped without having to take your gloves off. 🙂
I’m not affiliated in any way to these guys, this is just an unsolicited product recommendation based on what I’ve found to work well.