Amazon.com : Go Time Gear Life Emergency Bivy Sack - Thermal Survival Tent and Sleeping Bag Bivvy for Blanket, Shelter & Camping Use - Pack of 1 with Whistle - Green : Sports & Outdoors
Go Time Gear Life Bivy Emergency Sleeping Bag Thermal Bivvy - Use as Emergency Bivy Sack, Survival Sleeping Bag, Mylar Emergency Blanket - Includes Stuff Sack with Survival Whistle + Paracord String - Walmart.com
SOL Emergency Bivvy Sack – Gossamer Gear
What is a Bivvy Bag? (And can it replace my tent?) - Lotsafreshair