Plastpro fiberglass entry doors with exclusive Hydroshield feature fiberglass reinforced door skins, full-length composite stiles, and composite top & bottom rails to prevent water infiltration on all six sides preventing any build up of mold or mildew. Fiberglass is unmarred by the wear and tear of every day use and is unaffected by moisture and humidity. Plastpro doors will not rot, splinter or warp like wood, and won't dent or delaminate like steel.