I don't ever look out the back windows in my 4x8 blind so I went to Walmart and bought 2 6'x3' black curtains. I then put some hooks on the back wall and hung the curtain up lengthwise. Blocks out the sun and also keeps me from getting light up from behind in the blind. Only downside is that occasionally the mud-daubers will put a nest on the curtain. However, the mud peels off easily enough.