Adjustable: Comes with an elastic belt you can adjust around your neck, ensuring a comfortable experience with each use! Self-heating: Features self heating which provides relief from symptoms like neck pain or tension headaches. Material: Made out of 80% neoprene and 20% tourmaline. Size: Approximately 51 cm x 10 cm. Neck brace: Get a supportive neck brace massager. Options: Either get a one pack or a two pack of these neck massagers! | Supportive Neck Brace Self-Heating Massager | Wowcher