Review on Emergency Survival Mylar Thermal Sleeping by Dustin Gabrielle

These are ideal for emergencies and are great value for money. I also bought a Heavy Duty Titanium for comparison. They're about 30% lighter, so probably thinner (too thin to use a digital caliper for comparison). I don't know if thicker means they can be reused, but at 5-8 times the price they're best used in an emergency and then just thrown away. I don't think the extra cost of the Titan is worth it as I believe they should all come apart equally easily and hold heat the same (although I'd love to see some real world test comparisons). I don't even enjoy going hiking without these and a few other safety items. I've injured myself on the trail before or encountered injured people. They're great for what they're designed for - a lightweight "emergency" blanket. I hope you never need it, but better safe than sorry.