HealthSmart - Soft Foam Cervical Collar is designed to immobilize the cervical vertebrae during recovery and rehabilitation. It has a ribbed stockinet cover to help prevent heat buildup and perspiration, while promoting air circulation. Hook and loop adjustment makes the collar easier to use. Made of soft polyurethane foam. Hand washable. Width of collar : 2 1/2". Available in large (15 1/2"- 17 1/2") and x-large (17 1/2" to 21 1/2").