The TrailWarden Emergency Bivy is the 3.8-oz shelter you keep in the bottom of your pack and hope to never use. Constructed from aluminized polyethylene — the same material used in space blankets — it reflects and retains 90% of body heat, providing meaningful hypothermia protection when you're wet, injured, and waiting for weather to break or rescue to arrive.
Unlike foil space blankets that tear the moment you try to use them in wind, the bivy sack design fully encloses the user, eliminating the fumbling and tearing associated with flat emergency blankets. An orange exterior aids aerial visibility for search and rescue.
- Material: Aluminized polyethylene
- Heat retention: 90% of body heat
- Weight: 3.8 oz | Packed: 4x3 in
- Dimensions open: 84x36 in
- Exterior: High-visibility orange
- Reusable: Yes
