The Black Stallion AP1010-OD Easy Cooling Pipe Wrap helps control cool down, reducing weld cracking. The outer layer is made with FR canvas outer layer and is lined with with 18 oz. fiberglass and is stiched together with Kevlar® stitching throughout. Once wrapped around the pipe, it is held together by FR hook-and-loop attachments, which can overlap to allow wrap to fit mulitple pipe sizes.