For years I have been unable to handle heat from mid 20's and above due to having radiotherepy on the brain, our summers have been getting hotter and hotter and even staying in wasn't helping the effects of the heat any more. I tried lots of different window coverings before I came accross Sunstoppers and none of them helped at all. Sunstoppers put blinds up in my lounge about a month ago and after a week or so of 30 degree heat I can't express how grateful I am, my lounge is like a haven now. My only regret is I didn't find them earlier! I honestly can't recommend them enough!