Simonton Impressions windows are the best window on the market, in my opinion. With the choices in color: Almond or White, and the frame style choices: 7500 (Wide frame) or 7300 (narrow frame), not to mention the grid choices (too many styles & types to list) and the glass types available, it is no wonder that Simonton Windows is easily one of the most recognized window brands in the industry. These windows are all made of vinyl, and glazed with dual pane (insulating) glass. A common choice for the glass is Low-E, which makes your home more energy efficient with solar heat gain coefficients, u-values, etc. The warranty is also amazing! If the window breaks, Simonton will come out and fix your window at no cost (with the exception of a break-in/burglary, which is NOT covered). It is an unbelievable window and an unbelievable product. The pricing for the windows is a little more up front, but will pay back in the long run with your energy savings and warranty.