>>471744If you like pic specific, that is both comfortable with a mesh opening and a loop that keeps the fabric out of your face, look on ebay/online retailers/ for an Improved USMC Bivy Cover (don't remember the manufacturer of this stuff, but they don't sell to the public anyway). It is light when compared with competition, has creature comforts (as far as bivy goes), price is right.
Old surplus USMC bivy is comfortable when it comes down to space, but terrible for weight and bulk, and it has no loop to keep fabric off of your face.
Pic related, not mine, I did post about this bivy some time ago...