Duratemp Siding is an engineered plywood siding with 1/8" tempered hardboard face.It has the look of deep natural wood grain, resits dents, checks & cracks and is a 100% clear ( no wood or synthetic patches). We use 5/8" Duratemp for added strength and service life. In terms of maintenance and longevity Duratemp is the next best to vinyl, although for outdoor structures most people prefer the vertical orientation of Duratemp, along with its natural wood look.