Free, reasonable shipping included. My old Bibler bivy (pre-BD), not used for a couple decades, recently washed in Clean Sweep. Top is Toddtex (30″ at head, 20″ at foot, 80″ long, all +/-). Bottom is so leaky I consider it shot. I slept in it in AZ rainstorm last Jan. Top kept me dry with no observable condensation; bottom leaked in places. I can’t use it any more because it is now too hard for my aging body to get in and out. Maybe you can R/R the bottom or repurpose the ToddTex material.