Yate Bivy Aluminium Foil Silver

The Yate Bivy Aluminium Foil Silver is a basic emergency blanket measuring 211 × 132 cm and weighing 50 g — the kind of item that adds essentially nothing to pack weight but earns its place in a first-aid kit or emergency pouch. The aluminized layer reflects body heat back to the user and, depending on which side faces out, helps against both hypothermia and overheating. Its heat retention is rated at the standard level (60%), placing it with classic single-use foil blankets rather than dedicated insulated bivy sacks. There is no electronics or SOS function built in — this is a purely passive, mechanical layer of protection. Beyond wrapping around a person, it doubles as an improvised ground sheet or rain cover. Rescue teams and mountain services reportedly use the same type, which speaks to its reliability, but it remains an emergency, largely single-use tool rather than a substitute for planned overnight shelter.