The Lifesystems Heatshield Bag is a reusable thermal survival bivvy that reflects and retains over 90% of body heat, hand-picked for hikers, climbers and emergency planners who want a genuine cold-weather safety net rather than a one-use foil blanket. Made from durable metallized polyester with thermally sealed seams and a built-in radar reflector, it packs down to 70 x 60 x 60 mm and weighs just 110 g (3.88 oz), yet opens to a full 210 x 90 cm bag you can climb inside.
Our gear specialists include this bivvy in serious day kits because it does more than the flimsy survival blankets most people carry. Its bag shape traps far more warmth than a flat sheet, its sealed seams block wind and water, and the radar reflector helps rescuers locate you electronically - a real advantage if you are ever stranded, injured or waiting out bad weather.
Who is the Heatshield Bag designed for?
This bivvy belongs in the pack of hill walkers, climbers, trail runners, hunters and anyone heading into remote or exposed country where weather and terrain can change fast. It is a smart carry for solo adventurers who may have to wait for help, and for trip leaders responsible for a group's safety. Keep one in a car, boat or emergency go-bag too, where its warmth and radar reflector could matter in a breakdown or accident.
How do you use the Heatshield Bag in an emergency?
When you need it, pull the bag from its nylon sack and climb inside, either alone for maximum warmth or wrapped around an injured companion. The reflective interior bounces your body heat back at you while the sealed seams cut wind and rain. Because it is a full bag rather than a sheet, you are not fighting to keep a blanket wrapped in the wind. Afterward, it repacks into its sack for the next trip.
How does the Heatshield Bag compare to a foil blanket?
Standard emergency foil blankets are cheap, single-use flat sheets that flap in the wind and tear easily. The Heatshield Bag is a step up: a reusable, enclosed bivvy that retains over 90% of body heat, seals out weather and adds a radar reflector for rescue. For not much more weight, you get warmth you can rely on and a safety feature a basic blanket cannot offer, which is why it suits genuine backcountry safety kits.
Specifications
| Characteristic | Lifesystems Heatshield Bag |
|---|---|
| Weight (EU) | 110 g |
| Weight (US) | 3.88 oz |
| Dimensions (EU) - Unfolded | 210 x 90 cm |
| Dimensions (US) - Unfolded | 82.7 x 35.4 in |
| Dimensions (EU) - Packed | 70 x 60 x 60 mm |
| Dimensions (US) - Packed | 2.8 x 2.4 x 2.4 in |
| Material | Metallized Polyester |
| Thermal Retention | Reflects and retains over 90% of body heat |
| Seam Construction | Thermally Sealed and Taped |
| Rescue Feature | Radar Reflector Included |
| Protection | Waterproof and Windproof |
| Usage | Emergency Situations |
| Color | Orange |
| Best Use | Survival Racing, Extreme Sports, Solo Backpacking, Alpine Rescue |
Key features
- Reflects and retains over 90% of body heat, giving genuine warmth in an emergency stop, injury wait or unplanned night out.
- Full bag shape (210 x 90 cm unfolded) surrounds you completely, trapping far more heat than a flat foil blanket that only covers one side.
- Built-in radar reflector helps rescue teams detect you electronically, improving your chances of being found in poor visibility.
- Thermally sealed seams create a waterproof and windproof barrier, keeping rain and cold drafts out while you shelter.
- Reusable, durable metallized polyester construction is made to survive repeated use rather than tearing after one deployment.
- Extremely packable at 70 x 60 x 60 mm and light at 110 g (3.88 oz), so it earns its place in any day pack.
- Includes a dedicated nylon storage sack that keeps it compact and protected until the moment you need it.
The Lifesystems Heatshield Bag is a reusable thermal survival bivvy that reflects and retains over 90% of body heat, hand-picked for hikers, climbers and emergency planners who want a genuine cold-weather safety net rather than a one-use foil blanket. Made from durable metallized polyester with thermally sealed seams and a built-in radar reflector, it packs down to 70 x 60 x 60 mm and weighs just 110 g (3.88 oz), yet opens to a full 210 x 90 cm bag you can climb inside.
Our gear specialists include this bivvy in serious day kits because it does more than the flimsy survival blankets most people carry. Its bag shape traps far more warmth than a flat sheet, its sealed seams block wind and water, and the radar reflector helps rescuers locate you electronically - a real advantage if you are ever stranded, injured or waiting out bad weather.
Who is the Heatshield Bag designed for?
This bivvy belongs in the pack of hill walkers, climbers, trail runners, hunters and anyone heading into remote or exposed country where weather and terrain can change fast. It is a smart carry for solo adventurers who may have to wait for help, and for trip leaders responsible for a group's safety. Keep one in a car, boat or emergency go-bag too, where its warmth and radar reflector could matter in a breakdown or accident.
How do you use the Heatshield Bag in an emergency?
When you need it, pull the bag from its nylon sack and climb inside, either alone for maximum warmth or wrapped around an injured companion. The reflective interior bounces your body heat back at you while the sealed seams cut wind and rain. Because it is a full bag rather than a sheet, you are not fighting to keep a blanket wrapped in the wind. Afterward, it repacks into its sack for the next trip.
How does the Heatshield Bag compare to a foil blanket?
Standard emergency foil blankets are cheap, single-use flat sheets that flap in the wind and tear easily. The Heatshield Bag is a step up: a reusable, enclosed bivvy that retains over 90% of body heat, seals out weather and adds a radar reflector for rescue. For not much more weight, you get warmth you can rely on and a safety feature a basic blanket cannot offer, which is why it suits genuine backcountry safety kits.
Specifications
| Characteristic | Lifesystems Heatshield Bag |
|---|---|
| Weight (EU) | 110 g |
| Weight (US) | 3.88 oz |
| Dimensions (EU) - Unfolded | 210 x 90 cm |
| Dimensions (US) - Unfolded | 82.7 x 35.4 in |
| Dimensions (EU) - Packed | 70 x 60 x 60 mm |
| Dimensions (US) - Packed | 2.8 x 2.4 x 2.4 in |
| Material | Metallized Polyester |
| Thermal Retention | Reflects and retains over 90% of body heat |
| Seam Construction | Thermally Sealed and Taped |
| Rescue Feature | Radar Reflector Included |
| Protection | Waterproof and Windproof |
| Usage | Emergency Situations |
| Color | Orange |
| Best Use | Survival Racing, Extreme Sports, Solo Backpacking, Alpine Rescue |
Key features
- Reflects and retains over 90% of body heat, giving genuine warmth in an emergency stop, injury wait or unplanned night out.
- Full bag shape (210 x 90 cm unfolded) surrounds you completely, trapping far more heat than a flat foil blanket that only covers one side.
- Built-in radar reflector helps rescue teams detect you electronically, improving your chances of being found in poor visibility.
- Thermally sealed seams create a waterproof and windproof barrier, keeping rain and cold drafts out while you shelter.
- Reusable, durable metallized polyester construction is made to survive repeated use rather than tearing after one deployment.
- Extremely packable at 70 x 60 x 60 mm and light at 110 g (3.88 oz), so it earns its place in any day pack.
- Includes a dedicated nylon storage sack that keeps it compact and protected until the moment you need it.
Questions & answers
Heatshield Bag FAQ
Is the Lifesystems Heatshield Bag reusable?
Yes, it is designed to be reused. Unlike disposable foil blankets that tear after one use, it is made from durable metallized polyester built to survive repeated deployment, so you can practice with it and rely on it across many trips and seasons.
How much body heat does it retain?
It reflects and retains over 90% of your body heat. Its metallized interior bounces radiated warmth back toward you, and because it is a full bag that surrounds your body rather than a flat sheet, it holds far more heat than an open blanket in the same conditions.
What is the radar reflector for?
The built-in radar reflector helps rescue teams detect you electronically, even in poor visibility such as fog, darkness or heavy weather. This makes you easier to locate if you are stranded or injured, adding a genuine safety advantage over a standard emergency blanket.
How much does it weigh and how small does it pack?
It weighs just 110 g (3.88 oz) and packs down to 70 x 60 x 60 mm inside its nylon sack. That makes it small and light enough to keep permanently in a day pack, yet it opens out to a full 210 x 90 cm survival bag when you need it.
Is it waterproof and windproof?
Yes. Its thermally sealed seams create a barrier that keeps out rain and blocks the wind, so it shelters you from the elements as well as reflecting your body heat. That combination is what lets it protect you during an unplanned stop in bad weather.
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