Larson windows have a unique design – their tubular frame adds strength and durability, while double weatherstripping gives you the ultimate protection against air seeping in. These windows are easy to install and include an expander to compensate for uneven sills. Their Energy Efficient Low-E Glass is clear glass that has been coated with an invisible metallic oxide coating, reflecting heat while still allowing light to pass through. These are available in four colors: White, Brown, Almond, and Sandstone.