you can try the Snugpak Jungle bag. It's rated for comfort to 40*, and can be had on ebay for anywhere from $70 - $90. I think they're on Amazon as well. I'vwe got one and have used it for about 3 seasons here in Texas and whether it was hot and dry or hot and humid it performed well. It's also fairly light weight and compresses really small
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Awwww...go take a hike!