Meet TerraShell — a simple, reliable thermal bivy that helps keep you warm using the heat your own body produces. Compact, reusable, and ready whenever you need it.
We make emergency gear the way we'd want it for our own family: simple, compact, and ready when you need it.
No charging, no checking, no maintenance. Store it once and it's ready whenever you need a warm layer to lean on.
Open the pouch, unfold the bivy, climb in. Designed so anyone in the family, including kids, can use it with ease.
Four ounces, smaller than a soda can. Slips into a glovebox, a backpack, a carry-on, or a drawer by the front door.
Made with thicker 26-micron material so you can fold it up and use it again. Not a one-time emergency throwaway.
A lot of outdoor gear is bulky, complicated, or built for one trip only. We took a different approach.
Folds down smaller than a soda can and weighs about the same as a tennis ball. Easy to store, easy to carry anywhere.
Uses no batteries, no chargers, and no fuel. It works entirely by helping trap the heat your own body produces.
The outer layer blocks wind and resists water, so moisture and cold air stay out while warmth stays inside.
Unlike thin disposable foil blankets, TerraShell is thick enough to fold up and use again next time.
Simple enough that children can open and use it themselves with a quick demo from a parent or caregiver.
Buy it once, store it in the places that matter, and you're done. That's the whole idea: peace of mind without the hassle.
TerraShell is an emergency thermal bivy designed for everyday families who want a simple, reliable layer to count on.
Made from durable 26-micron polyethylene film with an aluminized inner lining, it helps trap the heat your own body produces and creates a windproof, water-resistant shell around you. No batteries, no fuel, no complicated setup.
It's compact enough to fit in a glovebox or a go-bag, and simple enough that any member of the family can use it comfortably.
Every detail is there for a reason. Here's what makes TerraShell a favorite in gloveboxes, closets, and go-bags across the country.
No fuel, no settings, no setup. Just two steps: open and climb in. Simple enough for kids, intuitive for adults.
We chose a clean army green finish so it blends in with the rest of your gear and feels at home in any setting.
The outer layer creates a water-resistant vapor barrier, keeping moisture out so you stay dry and comfortable.
Weighs just 4 ounces and folds down smaller than a soda can. Fits in your pocket, purse, glovebox, or bag.
Works entirely by helping trap the heat your own body produces. No batteries, no charging, no external power.
Each TerraShell includes a built-in signaling whistle — a thoughtful addition for outdoor adventures and road trips.
We designed TerraShell to be effortless. No instructions to memorize, no parts to break.
Car, living room, tent, or anywhere sheltered. TerraShell is designed to work wherever you need a warm layer.
Tear open the pouch, unfold the bivy, and climb inside. No setup, no assembly, no tools required.
The aluminized inner lining helps reflect your body heat back toward you, creating a cozy micro-climate.
Try TerraShell at home. Store it in the car, the closet, the go-bag. Show the family where it is and how to open it.
If you're not completely satisfied within 120 days, just send it back and we'll refund you in full. No questions, no hassle.
TerraShell started with a simple question: why is reliable emergency gear so complicated, expensive, or hard to find for everyday families?
We didn't set out to build a brand. We set out to solve a real problem — the kind you think about after a bad snowstorm strands someone you know, or when you realize your family car has no real plan for a winter breakdown.
What came out of that thinking was TerraShell: a thermal bivy that anyone can use, that fits anywhere, and that actually holds up when you need it. No gimmicks, no complexity. Just a well-made piece of gear that earns its spot in your glovebox and your go-bag.
We're a small, dedicated team based in the United States. Every product decision, every material choice, every line of copy goes through one filter: would we trust this for our own family? If the answer is yes, it goes out. If not, it goes back to the drawing board.
Ready to add TerraShell to your family's plan?
Shop TerraShellTerraShell is made from durable 26-micron polyethylene film with an aluminized inner lining. The material is non-toxic and designed to help trap your body heat while blocking wind and resisting water.
TerraShell works by creating an enclosed shell around your body. The inner aluminized layer helps reflect your own body heat back toward you, while the outer shell blocks wind and resists water. It uses no batteries, no fuel, and no external power.
Yes. Unlike thin disposable foil blankets, TerraShell is designed with thicker 26-micron material that allows for multiple uses. Fold it back up after use and store it for next time.
We chose a clean army green finish to give TerraShell a low-profile, timeless look that fits naturally alongside other gear. If you ever need to signal for help, every TerraShell includes an integrated whistle.
Cotton and wool blankets are heavy, bulky, and lose insulation when damp. TerraShell folds down smaller than a soda can, weighs just 4 ounces, blocks wind, and resists water — all while being easier to store.
Orders ship from our warehouses within 24 hours and typically arrive in 10-15 business days within the U.S. Free shipping is included on every order.
We offer a 120-day satisfaction guarantee. If you're not happy for any reason, contact our support team and we'll issue a full refund — no questions asked.
TerraShell is made for everyday families, drivers, campers, hikers, and anyone who likes the idea of having a simple, compact layer of thermal protection on hand.
Thousands of families have added TerraShell to their glovebox, their closet, their go-bag. Not because something bad happened — because a little preparation feels good.
