A layer of polyvinyl butyral bonded between panes of heat-strengthened glass gives Weather Shield's LifeGuard windows and doors added durability. Styles include casement, awning, double-hung tilt, and direct-set shaped windows and French sliding, swing-out, and radius-top French swinging patio doors. The products' extruded aluminum-clad exteriors can be pre-finished in standard or custom colors or in one of eight anodized options. Interior finishes include painted pine or a choice of five wood species. Weather Shield Mfg., 800.538.8836; www.weathershield.com.