The TACT Bivvy 2.0 adds a full hood and improved breathability over standard mylar emergency blankets. At 4 oz, it weighs half the SOL Escape Bivvy with equivalent thermal protection.
| Hood | Yes (integrated) |
| Color | Orange |
| Price | ~$15 |
| Weight | 4 oz |
| Material | HeatEcho aluminized polyethylene |
| Waterproof | Yes |
| Packed Size | Fist-sized |
| Heat Reflection | 90% (HeatEcho) |
The TACT Bivvy 2.0 uses HeatEcho material that reflects 90% of radiated body heat — slightly better reflectivity than the SOL Escape Bivvy at half the weight. The hood is the key differentiator: without head coverage, heat loss through the head significantly degrades the shelter effectiveness of any sleeping bag configuration.
Heat loss through the head runs 30-40% of total body heat loss. A sleeping bag without head coverage loses its advantage rapidly in a survival scenario. The TACT Bivvy 2.0's integrated hood closes that gap.
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