Just an update, I've had the window sox on for a few months now.... I have seen enuf cars in my travels with kids in the back with those roller type suction shades where you can only roll down the window so much OR where there is no shade for them at all... where as compared to the window sox, no problems rolling the window all the way down AND getting UV protection for the kids .... more calgarians should consider them IMO... to me it's a no brainer! It's been a warm enuf summer... Uv rays whilst not blistering like AU are still enuf if you are not use to it....