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Therm-a-Rest MondoKing 3D Sleeping Pad
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$259.95
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SKU: WX2*0719285
Overview
Built for hunters and other outdoorsmen who want a more comfortable camp sleep system, this pad focuses on support, warmth, and easy setup rather than minimal packed size. Its 4.25-inch foam construction and 7 R-value make it suited for year-round use, while the 3D shape and vertical sidewalls create a roomy sleeping surface. The soft stretch-knit fabric adds a plush feel, and the TwinLock valve with included pump sack helps simplify inflation and deflation at camp. It is a strong fit for base camp, truck camping, or any trip where sleeping comfort matters more than shaving every ounce.
Why Hunters Choose the Therm-A-Rest
7 R-value
Supports year-round use in varied
4.25-inch Loft
Substantial cushioning off the ground
Stratacore Construction
Adds 3D shape and compresses
Twinlock Valve
Design separates inflation and deflation
Breathable Stretch-knit
Fabric offers a soft sleeping
Key Features
- 7 R-value supports year-round use in varied conditions.
- 4.25-inch premium urethane foam adds substantial sleeping comfort.
- StrataCore construction creates a lofty 3D shape and packs down easily.
- TwinLock valve uses two one-way valves for inflation and deflation.
- Breathable stretch-knit fabric provides a soft, plush sleeping surface.
- Includes a go-anywhere stuff sack and breath-saving pump sack.
Best Used For
- Hunters wanting a thick, comfortable camp mattress for extended basecamp stays
- Cold-weather campers needing a sleeping pad with 7 R-value for year-round use
- Users who prioritize plush support and a large sleep surface over minimal packed size
- Vehicle campers and overlanders packing a pad that compresses for storage
- Anyone seeking easier inflation and deflation with the TwinLock valve system
Specifications
| Construction | StrataCore |
|---|---|
| Dimensions 2xl | 30 in W x 80 in L x 4.25 in D |
| Dimensions Large | 25 in W x 77 in L x 4.25 in D |
| Fabric | Breathable stretch-knit fabric |
| Foam | Premium urethane foam |
| Included Accessories | Stuff sack; pump sack |
| Packed Dimensions 2xl | 31 in L x 10.5 in diameter |
| Packed Dimensions Large | 26 in L x 10.5 in diameter |
| R Value | 7 |
| Thickness | 4.25 in |
| Valve Type | TwinLock valve |
| Weight 2xl | 5 lbs. 8 oz. |
| Weight Large | 4 lbs. 6 oz. |
Pros
- 7 R-value supports year-round use in varied conditions
- 4.25-inch loft provides substantial cushioning off the ground
- StrataCore construction adds 3D shape and compresses for packing
- TwinLock valve design separates inflation and deflation for easier setup
- Breathable stretch-knit fabric offers a soft sleeping surface
- Includes a pump sack and stuff sack for transport and inflation
Considerations & Trade-offs
- The 4.25" thickness and 3D sidewalls prioritize comfort and a large sleep surface, but they also make the pad bulkier and heavier than minimalist sleeping options.
- At 4 lbs. 6 oz. for Large and 5 lbs. 8 oz. for 2XL, this is a substantial pad to carry, so it suits base camp or car-camping use more than lightweight backcountry travel.
- The included pump sack and TwinLock valve help with setup and deflation, but the system still adds a few extra steps compared with simpler pads.
- The 7 R-value and premium foam construction are aimed at year-round warmth and support, which may be more pad than needed for hunters looking to minimize packed size and weight in milder conditions.
Suggested Comparisons
- Cold-weather sleeping pads
- Self-inflating sleeping mats
- Backpacking sleeping pads
- Base camp sleeping systems
Suggested Accessories
- Sleeping pad repair kit
- Pump sack
- Sleeping bag
- Ground tarp
Frequently Asked Questions
What makes the MondoKing 3D Sleeping Pad suited for cold-weather use?
The product lists a 7 R-value and describes it as having an incredibly warm urethane foam core. The source says it is intended for year-round use, but it does not provide temperature ratings.
How thick is the sleeping pad?
The product description states 4.25 inches of thickness/loft.
What inflation and deflation system does it use?
It uses a TwinLock valve design with two one-way valves: one for inflation and one for deflation. The description also says it inflates 3 times faster than the average air pad.
What comes included with the pad?
The pad includes a go-anywhere stuff sack and a pump sack.
What size options and packed dimensions are listed?
The source lists two sizes: Large, which measures 25 inches wide by 77 inches long by 4.25 inches deep and packs to 26 inches long by 10.5 inches in diameter; and 2XL, which measures 30 inches wide by 80 inches long by 4.25 inches deep and packs to 31 inches long by 10.5 inches in diameter.