DRE Vet Washable Warming BlanketsDescription DRE Vet Washable Warming Blankets These cost effective warm air blankets are safe. They are constructed of a silky polyester fabric with a waterproof nylon inlay to maintain airflow upward toward the patient. Compared to other air blankets on the market, which are disposable, these blankets are machine washable (hang to dry). Any of the major brands of warm air convection units can be attached to the blanket using a nylon cord and a 5"