I am a hot sleeper, and do most of my backpacking in summer months.  Even with a 50 degree sleeping bag, it is still too much, but I can't find anything reasonably priced that weighs less than my 1lb 15 oz bag.  I'd love to chop another pound from my pack weight; is there something that people use that works well in place of a sleeping bag for someone like me?  I've considered just bringing a cotton bedsheet...

 

Thank you in advance...