I have seen them at my local outdoor-store, but they were very expensive (>€40) and I thought they were basically a couple of space-bags put over eachother and then vacuum-packet, so I didn't buy one. I did talk with the retailer about it and he found it to be fragile and noisy, wich is similair to a 'regulair' space-blanket .

Instead, I imported a AMK thermolite II bivvy amd a heatsheet.