The Tact Bivvy Survival Blanket. This story is pretty crazy. In the mid 60s NASA was hard at work coming up with new technologies for the space program. One of the most impressive technologies they perfected was used to protect sensitive equipment from the extreme cold of outer space. Recently that technology was made available to the public. And the good news is a group of brilliant survivalists decided to ... 7/15/2017 ~ Las Cruces, New Mexico ~ 1.5 mi.