The window tilts in at the top to provide cross-flow ventilation and then, with the simple turn of the handle, opens wide like a casement window for easy cleaning. Most people would never realize the clever functionality of this product just by looking at it. That’s because it really doesn’t look that different from any other window. But upon close inspection, you notice that the fit and finish is very nearly perfect. The surface is smooth and flawless. The glass looks thick and strong — because it is. EcoStar’s windows also offer another significant advantage over other windows – they will not rust, will not rot and will not shrink or warp.