I just got out and went into the cold and snow storms to try it and yes it was quite warm, to the point of sweating. Now remember that it's not okay to wear top gear. , but even more so when lounging around camp, or worn under waterproof outerwear or in a cold-weather sleeping bag. Yes, it will withstand snowstorms, but it's by no means waterproof, and I wouldn't wear it in the rain or snow. Its surface isn't delicate, but I could see that it's easy to poke with a brush or something. In addition, it is quite warm and of good quality. The weight is considered as warm as possible for this type of weight. Others, more versatile, can be described as waterproof and better suited to waking up in the bush, weighing much more or twice that weight. But remember that this does not work as outerwear. mostly on hiking trails.