Evolution Sleeping Bag Hammock integrated baffling quilting top quilt underquilt overquilt long comfortable durable
durable weatherproof 20° F rating perfect for car camping evolution hammock sleeping bag
Evolution 20 Down Sleeping Bag Hammock
Evolution 20 Down Hammock in stuff sack
Evolution 20 Down Hammock Hanging System
Man in Grand Trunk Evolution Hammock over riverbed waterfall in background fall camping foliage
Underside of Evolution Hammock, showing the down thermal insulation baffling comfort
Man reading in evolution hammock suspended from camper van in forest van life propane tank foliage pine barefoot
Man reading in Evolution hammock with a smile on his face outside van life hanging on tree trunk with pendant and forest
Woman walking up from a good nights sleep in the Evolution sleeping bag Hammock by Grand Trunk with siesta pillow in forest outdoor adventure
Woman smiling in Evolution Hammock comfortable and cozy hammock camping in forest outdoors
Man waking up in Evolution Hammock comfortable warm with meadow mat in background in forest green foliage
Evolution Sleeping Bag Hammock integrated baffling quilting top quilt underquilt overquilt long comfortable durable
durable weatherproof 20° F rating perfect for car camping evolution hammock sleeping bag
Evolution 20 Down Sleeping Bag Hammock
Evolution 20 Down Hammock in stuff sack
Evolution 20 Down Hammock Hanging System
Man in Grand Trunk Evolution Hammock over riverbed waterfall in background fall camping foliage
Underside of Evolution Hammock, showing the down thermal insulation baffling comfort
Man reading in evolution hammock suspended from camper van in forest van life propane tank foliage pine barefoot
Man reading in Evolution hammock with a smile on his face outside van life hanging on tree trunk with pendant and forest
Woman walking up from a good nights sleep in the Evolution sleeping bag Hammock by Grand Trunk with siesta pillow in forest outdoor adventure
Woman smiling in Evolution Hammock comfortable and cozy hammock camping in forest outdoors
Man waking up in Evolution Hammock comfortable warm with meadow mat in background in forest green foliage

Evolution 20 Down Sleeping Bag Hammock

$388.00

Revolutionize Your Camp Sleep: Evolution 20 Down Hammock

The Evolution 20 Down Sleeping Bag Hammock combines a down sleeping bag with a hammock for the ultimate camping comfort. This innovative design offers warmth and freedom of movement, with integrated insulation to keep you cozy in cold weather. Lightweight and weatherproof, it’s perfect for any adventure. Includes compression and storage sacks, plus two aluminum carabiners. (Hanging kit/straps sold separately.)

  • Integrated Design
  • RDS Certified
  • Lightweight
  • Weather-Proof

Buy 2+ Get 15% off

Lifetime guarantee

Lifetime Warranty

We stand behind our products and provide a full warranty for the life of your product.

Rectangle 78 (1).png__PID:8474f8a6-6850-4dd3-958a-fac5fad8dc2b

money back guarantee

If you're not satisfied with the goods, you can return or exchange them within 30 days.

image (1).png__PID:74f8a668-502d-4395-8afa-c5fad8dc2b1c

Free Shipping

Free shipping: orders over $39 in the contiguous US, and orders over $200 internationally.

Grantrunk Features
Evo Down.jpg__PID:5e86965c-9be5-4954-b2af-ed80a0cf312b

Ultimate Warmth

Experience unparalleled warmth and comfort with the Evolution Down Hammock's integrated baffled insulation. Designed to eliminate cold spots and maximize loft, our innovative insulation system ensures that you stay cozy and snug, even in the coldest of conditions. Say goodbye to chilly nights and hello to uninterrupted relaxation – our hammock provides the perfect sanctuary for outdoor comfort, no matter the weather.

Portable & Comfortable

Evolution Down Features.jpg__PID:6f94215d-9015-42f6-8477-5086435ac8eb
Mayfly Images 2.png__PID:c3ec0cd3-3875-4b8f-8415-c7e319ef71f9

Ultimate Portability

The Evolution 20 Down Hammock redefines portability, weighing just 4.2 lbs and packing down to a compact 13 x 7 x 7 inches. It’s designed for adventurers who value convenience without compromising comfort. Easily stow it in your backpack and carry it effortlessly on any journey, knowing that a cozy, warm night's sleep is always within reach.

Evolution Down Portable.jpg__PID:9be53954-b2af-4d80-a0cf-312b49c22312

Made for Every Adventure

Evolution Down -1.png__PID:ed80a0cf-312b-49c2-a312-15c0c2105ba1
Evolution Down -4.png__PID:49c22312-15c0-4210-9ba1-6517534e444a
Evolution Down -3.png__PID:312b49c2-2312-45c0-8210-5ba16517534e
Evolution Down -2.png__PID:a0cf312b-49c2-4312-95c0-c2105ba16517
Mayfly Images 2.png__PID:c3ec0cd3-3875-4b8f-8415-c7e319ef71f9

Lifetime Assurance

Based in Salt Lake City, Utah, our American-owned company proudly stands by the quality and durability of our products. We offer a 100% lifetime guarantee on the Mayfly Chair. If it breaks, we'll replace it—no questions asked. Enjoy complete confidence in your purchase, knowing your satisfaction is our top priority

GrandTrunk logo

Which one is right for you?

Evolution Down

$207.96

EVO-DOWN-Main (1).webp__PID:3954b2af-ed80-40cf-b12b-49c2231215c0BUY NOW
  • Temperature Rating: 20°F
  • Weight Capacity: 400lbs
  • 650+ Fill Power Duck Down

Evolution Synthetic

$179.95

evo-s-5 (1).webp__PID:b2afed80-a0cf-412b-89c2-231215c0c210BUY NOW
  • Temperature Rating: 20°F
  • Weight Capacity: 400lbs
  • Synthetic fill

360° ThermaQuilt 

$79.95

TQ-01_Blanket.webp__PID:231215c0-c210-4ba1-a517-534e444ad4ecBUY NOW
  • Temperature Rating: 50°F
  • Weight Capacity: 500lbs
  • Synthetic 140 GSM fill

Customer Reviews

Based on 26 reviews
73%
(19)
15%
(4)
4%
(1)
8%
(2)
0%
(0)
D
DAVID TOLLETT (Denver, CO)
20 down sleeping bag hammock

Tried it this weekend. The worked very nicely extremely warm. Would recommend. Would recommend a pouch be sewed on. But I would recommend.

B
B.H. (Logan, UT)
Awesome!

I bought two EVOLUTION 20 DOWN SLEEPING BAG HAMMOCKS. I am a long time hammock camper, but when I starting bringing my girl friend along, she wanted to be together in a tent for security. I convinced her to try a hammock...we were both warm and cozy and with two hammocks hung together with the ENO spreader bars she had the close proximity/security she was looking for. No cold spots. At 10,200 ft it got cold at night (~high 30s) and we were both toasty warm. We used two MOZZY LITE Hammock Bug nets and two ABRIGO RAIN FLY SHELTERS to create our little airborne home away from home. Set up was a breeze and carrying this gear was easier and lighter than bringing a tent, two sleeping bags, two sleeping pads etc...plus the comfort of a hammock is hands down a major win over a tent. All of Grand Trunk's stuff is awesome (I have 2 Mozzy Lites, Two Mozzy 360s, a skeeter beeter, two abrigos, and five double deluxe hammocks). Now my only wish (not a complaint, but rather a plea to Grand Trunk)....please, please combine the awesomeness of the EVOLUTION 20 DOWN SLEEPING BAG HAMMOCK with that of the SKEETER BEETER XT (and make it a double deluxe)!!!!! This will bring your guys into a position to take over the market...I would order 4-5 of them the first day they are available and sell all my other gear.

D
Dan Friesen (Halifax, NS)
Evolution 20 down hammock/sleeping bag

I love the evolution 20. It's so simple to set up without having the extra under quilt with its straps, etc., and it's great to feel so comfy in it while it's snowing outside.
Realistically, I can sleep Comfy with no cold spots at 0°C/30°F without a sleeping bag or a blanket inside, as long as I have my jeans, shirt, and a medium down jacket with hood on. Below that I would use a sleeping bag.
It seems well-made. Online you will find some concern about being able to see daylight at the two cross-hammock seams, which is true on mine as well, but I have no indication that it would actually come apart there. And they do have a lifetime warranty.
I would have preferred a colour like Superior Hammock has, but at three times the price, I couldn't justify it. One thing they could introduce in the future would be a zipper on bug net, even if it was just a half type, but I haven't crossed that bridge yet because I'm still camping in the snow.
It's very light at 4.2 pounds and comes with a great stuff bag, reducing the size a lot more than one would expect. Great for the backpack.
The down in it will be compressed when you first get it out of your parcel, but give it a shake or two and leave it out for a few minutes, and it will expand greatly to fill the compartments.
I hang it with the daisy chain straps and carabiner clips. Really quick set up. Really like it! Feels more comfy than my own bed!

M
M.C.
Fantastic sleep system.....

Finally broke ours in New Years Eve 23/24. Wow! 40° and toasty! I am pleasantly surprised at the comfort. We set ours up in tandem using Spreader Bars, not sure I like this setup as she gets up to pee every 15 minutes and puts me almost on the ground. 😂
Overall, I'm very pleased with this hammock. I still have to try the synthetic version, but I'm sure it will be just as awesome.
This puts ne at two MOABs, two Down Evolutions, one Synthetic Evolution. I just need to find a better tarp system. The Abrigo doesn't give enough coverage for tandem hammocks.
Next GT purchase? The Mozzy 360 bugnet shelter x2.

E
Erick T (Charlotte, NC)
Where has this been my whole life?!?!

The evolution 20 exceeded all expectation. This thing is absolutely awesome, and at a great price. So warm and cozy, and makes setting up hammock camp so much simpler than the underquilt systems I have used in the past. If you love hammock camping, do yourself a favor and add this to your equipment checklist!

FAQs

Have a question about any of our products? Contact our Customer Service team below and we will respond within 1 business day.

What is the weight of the Evolution 20 Down Hammock?

The Evolution 20 Down Hammock weighs 4.2 lbs, making it lightweight and easy to carry on your outdoor adventures

Does the hammock come with a hanging kit or straps?

No, the hammock does not include a hanging kit or straps. However, we offer a variety of hammock suspension options that you can purchase separately.

What are the packed and unfolded dimensions of the hammock?

When packed, the hammock measures 13 x 7 x 7 inches. When unfolded, it has dimensions of 126 x 66 inches, providing ample space for a comfortable night's sleep.

What is the weight capacity of the Evolution 20 Down Hammock?

The hammock has a weight capacity of 400 lbs, ensuring durability and reliability during use.

What makes the Evolution 20 Down Hammock suitable for cold weather?

The hammock features RDS Certified 650+ down fill with a 20-degree rating, along with an integrated baffled insulation under-quilt to keep out the cold, making it ideal for cooler temperatures.

Is the hammock made from weather-resistant materials?

Yes, the Evolution 20 Down Hammock is crafted from TrunkTech™ 40D Nylon Diamond RS 290 WR, which is weather-proof, ultra-soft, breathable, and fast-drying for maximum comfort in various conditions.

Does the Evolution 20 Down Hammock come with a storage solution?

Yes, the hammock includes a compression sack and a storage sack, making it easy to pack and store when not in use.

Can I move freely inside the hammock?

Absolutely! The integrated sleeping bag technology provides a range of motion while keeping you cozy and comfortable throughout the night.