My question is, what size is it?  
Did anyone also notice the new 
Escape Bivvy, it looks like it may be a next generation of the Thermal Bivvy.  They don't state what percent of your body heat it reflects, but it is breathable.  That's a huge plus.  I have both the 
Emergency Bivvy and the 
Thermal Bivvy and have used the Thermal Bivvy multiple times.  I must admit, I'm curious about the new Escape Bivvy, but it sure is 
expensive!