Just what I needed for the windows on my deck.  I have 2 windows facing east on my deck, and the sun hits them bright and early.  As hot as it's been lately, the deck (and the house) gets real warm, real quick.  I had a couple of heavy towels over them, but it really looked tacky so I got these.  Since they're darkening blinds, they should keep the early heat off the deck and actually keep it cooler, thus keep the house a little cooler.  Here's hoping it does.