Emergency blanket (mylar)

Purpose

Retain body heat for a stranded or shocky person; doubles as ground sheet or signal panel.

Used in kits

• Basic Vehicle Emergency Kit

  Vehicle

• Winter Car Kit

  Vehicle

• Home First Aid Kit

  First Aid

• Compact Camping Kit

  Camping

• Bushcraft Fire Kit

  Bushcraft

Alternatives

• Wool blanket— Far more durable and warm, far bulkier — better for vehicle kits.
• Bivy-style emergency sack— Reusable upgrade; wind can’t open it.

Maintenance notes

• Single-use in practice — replace after any deployment.
• Check folds every couple of years; creases eventually crack.

Buying considerations

• Heavier "tarp-grade" versions (with grommets) survive actual use; the thinnest ones shred.