Real Fibers for Real Conditions
Backpacking rarely happens under perfect conditions.
The air grows damp as evening settles in.
Condensation forms inside the shelter.
Temperatures rise and fall throughout the night.
Morning dew covers the grass.
You climb into your sleeping bag carrying the moisture and fatigue of the day’s adventure.
These aren’t unusual circumstances.
They’re simply part of real adventure.
That’s why we chose real fibers.
Natural wool has spent thousands of years helping animals thrive through changing weather, fluctuating temperatures, and damp environments. Those same characteristics make it uniquely suited for sleeping outdoors.
Rather than trapping moisture, wool naturally helps manage it.
Rather than becoming clammy as conditions change, it continues working with your body throughout the night.
Because real fibers were made for real conditions.
The True Test of Performance Begins After Sunset
For years, sleeping bags have largely been judged by one number:
Warmth for the least possible weight.
That matters.
A lighter pack helps you move efficiently and cover more miles during the day.
But after enough nights outdoors, you begin to realize something.
A scale can tell you how much your sleeping bag weighs.
It can’t tell you how you’ll feel tomorrow morning.
Because the true test of performance begins after sunset.
When Gear Proves Itself
The best outdoor gear doesn’t prove itself riding in your pack.
It proves itself when the weather turns and conditions become real.
After ten miles on the trail.
When the temperature drops after sunset.
When humidity builds inside your shelter.
When condensation settles over camp.
When you’re tired, hungry, and tomorrow still holds another mountain.
That’s when great gear quietly goes to work.
Not demanding attention.
Not calling attention to itself.
Simply doing its job.
Performance That Helps You Perform
A sleeping bag does far more than keep you warm.
Throughout the night it becomes your shelter inside your shelter.
While you sleep, it helps manage moisture, regulate comfort, and create an environment where your body can recover from the day’s effort.
Because when you sleep better, you feel better.
And when you feel better, you hike farther.
The Rewilder wasn’t designed simply to perform well.
It was designed to help you perform better.
The Body Is the First Piece of Gear
Every adventure ultimately depends on one thing.
Not your backpack.
Not your boots.
Not your sleeping bag.
Your body.
Every mile tomorrow depends upon the condition of the body you wake up with.
That’s why every decision we made while designing the Rewilder centered on one question:
How does this help the person sleeping inside it?
Breathability.
Moisture management.
Natural comfort.
Quiet fabrics.
Dependable performance through changing conditions.
Because the body is the first piece of gear.
Everything else exists to support it.
Lightweight Backpacking for the Real World
The Rewilder is a true lightweight backpacking sleeping bag.
It comfortably fits within a lightweight backpacking system while offering something many ultralight bags cannot:
A naturally breathable sleep environment designed around the entire experience of spending nights outdoors.
We believe lightweight backpacking is about more than reducing ounces.
It’s about increasing capability.
A lighter pack helps you hike farther today.
Better recovery helps you hike farther tomorrow.
Both matter.
Crafted for Real Adventure
Every detail of the Rewilder was chosen with purpose.
Exterior: Constructed using 100% pure, chemical-free cotton, complementing the wool inside.
Protection: A beeswax layer elevates the wool sleeping bag’s defense against water and wind.
Inner Lining: Ruggedly crafted with 100% Merino wool, so you sleep soft and dry.
Filling: Packed with Eco Wool Batting, which is organically sourced from sheep raised in the U.S.A and organically milled.
Maintaining Your Wool Treasure: Easily hand washable. Check out our straightforward wool care instructions here.
Supported by Nature. Backed by Research.
Modern research continues to demonstrate what natural fibers have quietly done for generations.
Wool has been shown to help create a sleep environment that supports lower resting heart rate, improved thermal comfort, and more restful sleep compared with many other bedding materials.
Science continues confirming what experience has long suggested:
Natural fibers simply help people sleep well.
The Miles That Matter
A sleeping bag isn’t judged by the miles you carry it.
It’s judged by the miles it helps you walk the next day.
That’s why we designed the Rewilder around more than a single specification.
We designed it for mornings.
For long trails.
For changing weather.
For real adventure.
Because confidence doesn’t come from hoping conditions stay perfect.
It comes from knowing you’re prepared when they don’t.
When things get real…
The Rewilder is ready.
Specs Chart for Rewilder 20 Fahrenheit rating (-6.6 Celsius)
| Length | Girth (diameter around shoulders) | Size of person it fits | Weight | Volume | Compressed Dimensions |
|---|---|---|---|---|---|
| medium/76″ (193cm) | standard/ 56″ 147 cm | up to 5’10” (162 cm to 178 cm) | 4.0 lbs./ 1814 grams | 22 Liters | 11x11x11 inches/ 28x28x28 cm |
| Long/ 82″ 208 cm | standard/ 56″ 147 cm | 5’10” to 6’4″ 178 cm-193 cm | 4.25 lbs./ 1927 grams | 28 Liters | 12x12x12 inches/ 30x30x30 cm |
| Medium/ 76″ 193 cm | Wide/ 66″ 162 cm | up to 5’10” (162 cm to 178 cm) | 4.25 lbs./ 1927 grams | 28 Liters | 12x12x12 inches/ 30x30x30 cm |
| Long/ 82″ 208 cm | Wide/ 66″ 162 cm | 5’10” to 6’4″ 178 cm-193 cm | 5.0 lbs./ 2267 grams | 36 Liters | 13x13x13 inches/ 33x33x33 cm |
Specs Chart for Rewilder 10 Fahrenheit rating (-12 Celsius)
| Length | Girth (diameter around shoulders) | Size of person it fits | Weight | Volume | Compressed Dimensions |
|---|---|---|---|---|---|
| medium/76″ (193cm) | standard/ 56″ 147 cm | up to 5’10” (162 cm to 178 cm) | 5.0 lbs./ 2267 grams | 28 Liters | 12x12x12 inches/ 31x31x31 cm |
| Long/ 82″ 208 cm | standard/ 56″ 147 cm | 5’10” to 6’4″ 178 cm-193 cm | 5.25 lbs./ 2381 grams | 30 Liters | 12x12x13 inches/ 30x30x33 cm |
| Medium/ 76″ 193 cm | Wide/ 66″ 162 cm | up to 5’10” (162 cm to 178 cm) | 5.25 lbs./ 2381 grams | 30 Liters | 12x12x13 inches/ 30x30x33 cm |
| Long/ 82″ 208 cm | Wide/ 66″ 162 cm | 5’10” to 6’4″ 178 cm-193 cm | 5.5 lbs./ 2494 grams | 45 Liters | 14x14x14 inches/ 36x36x36 cm |
Choose between Merino Liner or Weatherwool
The liner is the fabric that surrounds you all night. We offer two wool options, each with a different character.
Merino Jersey
Soft • Light • Comfortable
Our original ReWilder liner is made from soft Merino jersey.
It provides an exceptionally comfortable next-to-skin feel, along with the natural temperature regulation and moisture management that make wool so well suited to sleeping.
The Merino is superwashed, a common textile treatment that helps wool resist felting and shrinkage and makes it easier to care for.
Choose Merino Jersey if you want:
- A soft, stretchy, next-to-skin feel
- Exceptional sleeping comfort
- Natural wool temperature regulation
- Excellent breathability and moisture management
- A lightweight, comfortable liner
Weatherwool® Worsted Wool
Pure • Durable • Minimally Processed
Our Weatherwool® option takes the ReWilder in a more rugged direction.
Instead of knitted jersey, Weatherwool® is a tightly woven worsted wool fabric. The wool fibers are carefully spun and densely woven into a smooth, durable outdoor textile.
But the difference isn’t only in the weave.
Pure Wool, Simply Finished
Weatherwool® is made from pure, undyed worsted wool without a superwash treatment or other performance additives.
Rather than modifying the wool to achieve its performance characteristics, Weatherwool® relies on the inherent properties of the wool fiber and the engineering of the weave.
The result is remarkably simple:
Pure wool. Carefully spun. Tightly woven. Nothing unnecessary.
Why Weatherwool® Changes Everything
Superior moisture management
Wool naturally absorbs and releases water vapor, helping regulate the humid microclimate inside your sleeping bag.
Exceptional breathability
Heat and moisture vapor can move through the fabric, helping you remain comfortable as temperatures change.
Greater durability
The tightly woven worsted construction creates a smooth, rugged fabric designed to withstand years of outdoor use.
Warmth when damp
Wool continues to provide thermal comfort even when it has absorbed moisture.
Minimal processing
The wool is undyed and does not rely on a superwash treatment or performance coating. Its performance comes from the fiber itself and the way it is woven.
Made in America
The wool is domestically raised, sustainably managed, and milled in the USA.
No added weight
The Weatherwool® version weighs essentially the same as the standard ReWilder.
Currently available in natural undyed white only.
Two Liners. Two Different Experiences.
Neither liner is simply “better.” They are designed around different priorities.
| Merino Jersey | Weatherwool® | |
|---|---|---|
| Feel | Soft & stretchy | Smooth & substantial |
| Breathability | Excellent | Exceptional |
| Moisture management | Excellent | Exceptional |
| Durability | Good | Excellent |
| Processing | Superwashed | Undyed, no superwash |
| Construction | Knitted jersey | Tightly woven worsted |
| Weight | Same | Same |
| Best for | Softness & comfort | Rugged performance |
Merino Jersey is the choice for softness, stretch, and a familiar next-to-skin feel.
Weatherwool® is the choice for maximum durability, ruggedness, and minimally processed wool.
Both give you the fundamental advantages of natural wool.
Steffi Rausch (store manager) –
Such a sweet feeling to sleep in one of these sleeping bags, especially with the organic wool, and LOVE how lightweight it is!
Jon (verified owner) –
I bought this bag while traveling in the United States, first I ordered the Medium but being 6’1″ this was too short for me. I was able to send the bag back and pay the extra for a Large. I’m very thankful to Lucky sheep for such a painless swap! The bag itself is amazing, not only have I slept under the winter stars back home in Australia, but I also will use it nightly at home. Lucky Sheep is a real innovator.