By adding lightweight mylar between my outer poncho and inner poncho liner I have dramatically increased their heat retention, and also added protection from EMF and Infrared Cameras.
https://www.amazon.com/Emergency-Signature-Thermal-Blanket-Activity/dp/B089QWBL5X
DONATE: https://cahlen.org/gift
CONTACT: https://cahlen.org/contact
SUBSCRIBE: https://cahlen.org/subscribe
GEAR LIST: https://cahlen.org/gear
NOTICE: https://cahlen.org/notice