These Aerial7 Stereo Headphone Beanies, listed at $39.99, are now $12.99 at Tanga. Plus, shipping is free, making this the best price we could find anywhere by at least $6. Choose from up to 10 different designs. These are unisex, all-weather acrylic beanies with thick polyester lining that will allow you to keep warm year round. It features innovative and ultra-slim Sound Disk headphones that stay hidden inside the lining of the cap. Its universal 3.5mm jack allows you to connect your MP3 player, smartphone or any other compatible 3.5mm music device. Sales tax is charged in most states.