I bought it not to protect against allergies. I was looking for a quality 100% cotton sleeping bag that I use every night when I'm on the road as a truck driver. I found this sleeping bag roomy and comfortable (I'm a tall guy, 6ft 2in, 280). Most sleeping bags I've tried in the past have been made out of lightweight material. It's a good weight. and lots of thread. The side zipper is strong. I prefer the zipper to others that use velcro - a less secure closure and will scratch your skin if you rub it. Although it's expensive, I would definitely buy it again. The high quality should give it a lifespan that justifies the price compared to others.Update 01/28/18 - It's been almost 2 years since I've been using this sleeping bag. I sleep in it about 260 nights a year and I finally wore it out. It has lasted at least three times longer than any other sleeping bag I've bought from Revain. I've tried 4 or 5 other brands but found them to be of lower quality (I won't name them as personal preference may vary.) I was completely satisfied with the quality of the material and construction of this product and will be making more order .
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