The Hear Through Earwarmer.

Unlike common winter headgear that baffles the sound around you, these acoustically-engineered earwarmers allow sound waves, such as those produced by cell phones, to penetrate while keeping the cold and wind at bay. The efficient channels in the shell fabric pass the sound of conversations and street traffic. The triple-layered honeycombed cushioned hypoallergenic foam is vacuum-formed to create the right shape to allow for sound transfer, and it provides superior thermal retention. The lightweight frame is only 3/4" thick for a discrete profile. (1 oz.)