Material: The pack is made of a colorful polyester. The strap is lightweight polypropylene with a plastic buckle clip. The el wire is carefully stitched onto each pack making it durable and long lasting! Fanny Pack Color Options: Navy Blue, Pink, Red, Green, Silver. Each bag has a matching el wire stitched on. El Wire: 3 modes: on, blinking and off. Battery Pack: The small battery pack is 3”L x 1”H and is placed within its own sleeve inside of the main compartment. Battery Type: This fanny pack takes 2 AAA batteries and batteries are included! Fanny Bag Size: Approx. 12" x 5" x 3 ½”Depth Compartments: 3 total compartments, front, main and back. Front: Approx. 8 ½”Length x 3 ½”Height Main: Approx. 9”Length x 4 ½”Height x 3 ½”Depth Back: Approx. 9”Length x 4 ½”Height Strap: Plastic clip buckle with an adjustable strap. Minimum Length: 22” Maximum Length: 45” Special Directions: Must hand wash and air dry. Excessive water will damage the el wire.