• 2 THERMO-S1 Emergency Bivys — 59% OFF
1 2
★★★★★ Excellent 17,000+ Reviews

2 THERMO-S1 Emergency Bivys

2 THERMO-S1 Emergency Bivys

When you can't get home, a wet night in the open turns dangerous fast. Two THERMO-S1 bivys keep body heat locked in — for you and someone you love.

  • 2× THERMO-S1 Emergency Bivy
  • Reflects up to 90% of your body heat back to you
  • Windproof & waterproof outer shell
  • Packs flat — fits any glovebox or bug-out bag
Low Stock Warning — Next restock: August 1st 2026
EVERY ORDER INCLUDES:
The Ultimate Survival ebook
The Ultimate Survival ebook
Essential crisis skills & self-reliance made simple.
$30FREE
Food Storage Guides & Workbook
Food Storage Guides & Workbook
Simple checklists to organize food, supplies & storage.
$20FREE
16 Emergency Prep Checklists
16 Emergency Prep Checklists
Covers everything needed for major emergencies.
$15FREE
Total value $65 — yours FREE with every order
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5,000L / 400-Gal
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VISAMASTERCARDAMEX
★★★★★

"Bought a pair after the last big blackout left us shivering. Tested one camping — genuinely warm, even in the wind. Now there's one in each car and I don't think twice about it."

Megan F., Newcastle NSW✔ Verified Buyer
Product Description
Cold is the quiet danger in almost every emergency. When the power's out or you're stranded, staying warm isn't comfort — it's survival. Wet and windy conditions pull heat from the body faster than most people expect. Get in, warm up, wait it out. The THERMO-S1 bivy is a full-body shelter built from heat-reflective material that sends up to 90% of your warmth back to you. Windproof and waterproof, it works when you're stranded, evacuating, or simply can't get home. Two bivys means you and the person beside you are both covered. Weighs almost nothing, packs to the size of your palm, never expires.
Shipping Details
Here is how our shipping process works. • Processing Time: 1–3 days • Cost: 100% FREE! Once shipped, you'll receive a tracking number so you know where your order is at all times. • Estimated Delivery: Most orders arrive 5–7 business days after being handed to the carrier. Need Help? If you have any questions about your order, contact us and we'll respond within 24 hours.
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Read What Our Customers Have To Say

★★★★★

Warm Through the Blackout

Storms knocked our power out for three nights last winter and the whole family climbed into these. Genuinely warm within minutes while the house dropped to single digits — the kids slept fine.

Andrew P., Ballarat VIC✔ Verified Buyer
★★★★★

Packs Down to Nothing

Keep one in each car and one in the camping tub. Weighs almost nothing, and I've stopped worrying about getting caught out on a cold night on the road.

Megan F., Newcastle NSW✔ Verified Buyer
★★★★★

Cheapest Insurance I've Bought

Tested one on a winter camp expecting rubbish for the price. Reflective inside, blocked the wind, stayed toasty. Ordered more for the relatives.

David R., Brisbane QLD✔ Verified Buyer

Lifetime Warranty: Every piece of Ballast Supply gear is guaranteed for life against manufacturing defects — if it ever fails to perform as promised, we'll replace it free, no questions asked. We build gear that works when your life depends on it, and we stand behind that promise forever.