I ride with a moto360 sport watch. All my phone notifications get mirrored to the watch, and I can respond via voice or by simple responses from a drop down menu. Can also initiate a phone call with words in an emergency.
It all pairs with my phone in my bag/pocket. The watch itself can run strava, so you can leave your phone in the car and it'll still record.
They are like $100 now, I'm really surprised they aren't more popular. So useful on the bike. Especially if you ride during business hours like I do sometimes. Bluetooth stereo headset, smartwatch, mobile work station in the woods!