Heat. Ordered for my cousin who told me, for some reason, he needs exactly 12 hours darkness a day in his spare room.

minerwally you don't put it on the windscreen, you burk.

We have a blackout roller blind in babies room but it still let's too much light from 4.30am in summer so this works well for us during those months. Adjustable size with Velcro bits and you have to make sure you wet and stick the suckers evenly and right to the edge of glass... However I still roll the black out blind over it and we have darkness! And still the baby does not sleep well...zzz

Wow that's an excellent price, well found. IIRC these are £25 new and ~£19 second hand everywhere else.

damn. wish it was available online.

great product for travelling with babies... and students...

Good price, but not an amazing product.

I'm a really light sleeper and got one for sleeping at friend's houses etc.

Obviously won't fully block out light at edges, though does through the material.

Sucker cups don't seem to be as great as they could be.

these are Fab, I found that they really blocked out the light in babies room

Great product for kids especially when travelling.

Heat. Ordered for my cousin who told me, for some reason, he needs exactly 12 hours darkness a day in his spare room.

We got rid of ours. It's too much of a hassle to put up and take down. Far better off buying a standard black out blind.