I am in the practice of trying something out before commiting it to a kit. Well I got around to trying out a Spaceblanket last night. It wasnt that cold, about 20 f. During the day I made a nice Aframe shelter. I scraped away what snow was on the ground and use one of my foam sleeping mats as a ground cover. At 2200 I went out to the shelter behind the house, unfolded the Spaceblanket and crawled into the shelter, wrapped myself in the blanket and tried to go to sleep. Long about 0100 I was shivering so bad I couldnt hardly crawl out of the shelter. I went into the house and made a cup of tea and wrapped up in a wool blanket. After a bit I started warming up and fell asleep.
Space Blankets are light weight and compact. However I dont think I will be depending on it to keep me alive over night in anything under about 40f. This is just my Opinion based on my experience with this item. I hope my experiment helps someone deside whether or not to carry or use one.
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