THERMO-S1 Emergency Bivy
THERMO-S1 Emergency Bivy
When you can't get home, this is what keeps you warm. The THERMO-S1 bivvy reflects up to 90% of your body heat back to you — a windproof, waterproof survival shelter that weighs almost nothing and lives in your glovebox.
- Reflects up to 90% of your body heat back to you
- NASA-developed thermal material
- Windproof & 100% waterproof shelter
- Effective across extreme temperatures, −40°C to 50°C
- Packs smaller than a drink can (~115 g); opens to 2.1 m
- Reusable & tear-resistant — lifetime warranty
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"Grabbed four — two for the cars, one in each emergency kit. The wife thought I was being paranoid until the storms last winter when we saw people stranded on the highway running their engines all night to stay warm. Now she's the one checking they're in the gloveboxes."
Product Description
Shipping Details
A Survival Shelter That Fits in Your Glovebox
Warmth when the power's out and you can't get home — no fire, no batteries.
90% Heat Reflection
NASA-developed material bounces your body heat back to you.
Windproof & Waterproof
Blocks rain, snow, sleet and wind in a sealed shelter.
Extreme Range
Effective from −40°C to 50°C.
Tiny & Light
Packs smaller than a drink can (
Reusable & Tough
Durable and tear-resistant — not a single-use foil blanket.
How It Works
Traps Your Own Heat
The NASA-developed thermal material reflects up to 90% of your body heat back to you instead of letting it escape. Your body makes the warmth — the bivvy keeps it in. No fire, no power needed.
Windproof & Waterproof
A sealed shelter that blocks rain, snow, sleet and wind while it keeps you warm.
Grab and Go
Packs down smaller than a drink can and weighs about 115 g — small enough for a glovebox, opening to 2.1 m to fit an adult.
Use It Again
Unlike disposable foil blankets, it's built from durable, tear-resistant material for repeated use.
the danger people underestimate
EXPOSURE: WHERE IT CATCHES PEOPLE OUT
A Stranded Vehicle
An Evacuation
A Blackout
Caught Out Bushwalking
Wet & Wind
Read What Our Customers Have To Say
Warm Through the Blackout
Power out for three nights in the winter storms. The whole family climbed into these and stayed warm while the house dropped to single digits.
Lives in Both Cars
Weighs nothing and packs down to nothing. Got caught out on a cold night on a back road and was glad it was there. One in each glovebox now.
Actually Reusable
Expected disposable rubbish for the price. Reflective inside, blocked the wind, and it's held up to repeated use. Ordered more for the relatives.
Lifetime Warranty: Your THERMO-S1 is guaranteed for life against manufacturing defects — if it ever fails to perform as promised, we'll replace it free, no questions asked. Backed by Ballast Supply: we build gear that works when your life depends on it.