Now you can really talk through your hat - well, your beanie cap.

The Bluetooth Beanie is a double knit music cap that helps keep you warm by covering your ears and letting you listen to your own 'hot' music as you walk, job, or play outdoors sports, via Bluetooth. Inside the cap is a wireless stereo earphone speaker/mic combo. It's made of 30% cotton / 70% acrylic. Amazon says it has the latest 4.1 version of Bluetooth, which means simple and fast connecting to your smart devices. (It went quickly when I paired me cap.) The wireless range is about 33 feet. Built in rechargeable Li-Ion battery, offering 6-8 hours working time, 60 hours standby time, with 2.5 hours charging time. I just listen to music with mine. The sound is pretty good considering you're just wearing a knit cap. Also you don't want the sound to block out your surroundings so you can be aware of what's going on arund you. I didn't try the built in microphone, but it's designed so you can take phone calls through the beanie. It doesn't come in sizes, it's one of those “One size fits most” caps. According to the instructions, you can remove the electronics from the hat and put them back after washing the cap, but I didn't try that.