Unless you are a Cheetoh or a Potato Chip,I doubt very much you will get any sleep if you have to deploy an emergency mylar bag/blanket! I say keep what you have,& add a Frogg Toggs rainsuit,they are light,fairly durable at least for emergency purposes,you can see your feet while stepping around obstacles,& they are quiet,& inexpensive,If you should develop a hole/rip,the little roll of duct tape in your Doug Ritter PSK should take care of that,Lickety-split!The Best advice has been said,& I will reitterate too,Test what works for you in a docile environment,your backyard.Remember-Potato Chips love to be eaten fresh,cause' they can't Stand that noisy a$$ bag,lol!