I've spent quite a few years sleeping in bags with down and noticed that in humid conditions I always felt colder. Well, after much looking into over the years it became apparent the 'humidty' was coming from my own body as much as the environment.
Along came 'Dry Cleaner Plastic bags' for my own cheap 'Vapor Barrier bag' when i could'nt afford the commercial ones. The Dry Cleaner Bags weigh next to nothing, pack small, are quite durable with some care, and work essentially like the expensive ones. I lay the dc bag inside my sleeping bag with the zip open, climb into it, adjusting as necessary, before zipping up the bag. Some bags come up to my armpits, others are longer and come above my shoulders, both will work. <img src="/forums/images/graemlins/smirk.gif" alt="" />
PEPPER SPRAY AIN'T BRAINS IN A CAN!