This is a great add-on if you have kids or just love to admire your chickens doing their thing in the coop without disturbing them. The 6mm thick tempered glass brings wonderful natural light into the coop in the mornings without sacrificing any of its cosy insulation, nor creating unwanted drafts of air. A fantastic addition to naturally stimulate your hens' egg-laying super-powers, but also rid your coop of mites. If you would like a viewing window, make sure you add this to your order prior to build!