Evolution 20° Synthetic Single Cold-Weather Sleeping Bag Hammock
| Bed size | 10 ft. 6 in. L × 5 ft. 6 in. W |
| Weight capacity | 400lbs |
| Material | 40D Nylon Diamond RS 290 WR |
| Product weight | 6lbs |
20-degree hammock camping warmth in one straightforward, synthetic-insulated sleep system.
The GrandTrunk Evolution 20 Synthetic Sleeping Bag Hammock combines a hammock and sleeping bag so insulation surrounds you from above and below. Its weather-resistant ripstop nylon and synthetic fill make it a practical option for cool-weather camping when simplicity and value matter more than minimizing packed weight.
- Built-in insulation: synthetic fill provides warmth above and below
- Cold-weather ready: 20°F temperature rating
- Integrated sleep system: hammock and sleeping bag in one design
- Complete storage kit: compression sack and storage sack included
Why We Love It
This is a value-focused choice for cold-weather hammock camping. It delivers the simplicity of an all-in-one insulated hammock at a more approachable price than the down-filled version.
Best for: cool-weather camping, car camping, backyard camping, and campers who want an integrated insulated setup without prioritizing ultralight packed weight.
Will It Fit My Space?
The hammock measures 10 ft. 6 in. long × 5 ft. 6 in. wide. Your exact hanging span depends on your anchor points and suspension system.
- Using trees? Choose structurally suitable trees and properly rated tree-friendly straps.
- Using another anchor? Confirm the anchor and all suspension components are rated for hammock use.
- Before you go: make sure your suspension system works with your planned campsite and the included carabiners.
What's Included?
- Evolution 20 Synthetic Sleeping Bag Hammock
- 2 lightweight aluminum carabiners
- Compression sack
- Storage sack
Not included: hammock straps and other suspension equipment.
Setup & Compatibility
Connect the hammock to a properly rated suspension system at suitable anchor points and adjust the hang before getting in. Because the insulation is integrated, there are fewer separate sleep components to position. Inspect the fabric, zipper, seams, carabiners, suspension, and anchors before each use.
Product Details
- Hammock type: Insulated single camping hammock
- Material: 40D Nylon Diamond RS 290 WR
- Insulation: Synthetic fill
- Temperature rating: 20°F
- Dimensions: 10 ft. 6 in. L × 5 ft. 6 in. W
- Packed dimensions: 20 in. × 9 in. × 9 in.
- Lounging capacity: 1 person
- Weight capacity: 400 lbs.
- Product weight: 6 lbs.
- Zipper: YKK
- Warranty: Lifetime manufacturer warranty
Care
Hand-wash with mild soap and hang to dry completely before storing. Avoid prolonged exposure to direct sunlight, and inspect the fabric, zipper, seams, carabiners, and suspension points before each use.
Frequently Asked Questions
Does this replace a separate sleeping bag and underquilt?
The Evolution 20 Synthetic combines the hammock, sleeping bag, and insulated underside into one integrated sleep system, reducing the separate components you need to manage.
What is the temperature rating?
It is rated to 20°F.
What kind of insulation does it use?
It uses synthetic insulation that provides warmth above and below the hammock.
Are hammock straps included?
No. Two aluminum carabiners are included, but straps and other suspension equipment are sold separately.
How does it compare with the down version?
This synthetic model weighs 6 lbs. and packs to approximately 20 in. × 9 in. × 9 in. It offers the same listed 20°F temperature rating while using synthetic rather than down insulation.
Lightweight nylon or polyester that packs down small, so it earns a place in a backpack or the trunk of a car. Most come with carabiners, and many include tree straps or another suspension, so all you need is two trees or posts. Some models add an integrated bug net, a rain shelter or an insulated sleeping bag for overnight trips. There are one-person and two-person sizes, rated from 300 to 500 lb.
- Camping and backpacking
- Road trips and travel
- Hanging between two trees
- Buggy evenings, in the bug-net models
- Not every model includes tree straps, so check what is in the box
- Use wide straps rather than rope to protect tree bark
- Weight ratings vary by model, from 300 to 500 lb










