The SAM® Splint is a flexible sandwich of soft aluminum and closed cell polyethylene foam that, when folded in specific ways, creates a rigid yet comfortable splint used to support and immobilize injuries and fractures of the extremities and neck. The SAM® Splint can be folded for storage, or rolled up easily to the size of an "ACE" wrap, and with proper care and cleaning, can be used over and over again. The possibility of sprains, dislocations and broken bones is too great to ignore. The immediate immobilization of the injured area not only reduces pain but can frequently lessen the secondary damage suffered while waiting for and during transit to a medical facility. Every substantial First-Aid kit should have one. The XL measures 5.25" x 36" and the Regular is 4" x 36".