i360 v2.0/20501 Hat Beanie Headphone for 3G iPod Nano (White/Blue) Designed for 3rd generation Apple iPod Nano video. Also compatible with Nike + iPod system. The i360 includes an internal 3 jack wiring system with detachable speakers allowing for easy disconnect when washing. While the usual over the ear speaker lacks, i360 designed custom speaker casing provides optimal sound quality and bass response for peak performance maximizing airflow with no distortion. Outer material: 100% Acrylic, Inner material: 100% Polyester Fleece. White with Blue Tag Designed for 3rd generation Apple iPod Nano video. Also compatible with Nike + iPod system. Internal wiring system + detachable speakers included. Custom thin speaker casing provides increased sound quality and bass response eliminating the dorky ear muff look. FABRIC CONTENT: Outer material: 100% Acrylic, Inner material: 100% Polyester Fleece .