The panels are made from ultralight MDF and formaldehyde free Masonite. Corners are joined with waterproof glue and double dowel joints and sanded to be seamless. Braces are added every 16" or less. Cradle is typically 2 1/2" wide but can be as wide as you wish. These panels are built to last and are 40% lighter than standard MDF.
Stretchers are made with clear pine, beveled to give a crisp (but not too sharp) edge for the canvas and braced with cross bars and 1/4" plywood across the corners.