Review: Rab Stratosphere 4 Sleeping Mat
Our Verdict
A durable, medium weight, insulated sleeping mat that provides extra comfort, both in the back country and closer to home.
All products featured on BASE are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission. Here’s how it works.
| Weight | 695g (regular) |
| Dimensions | 183 x 51cm |
| Packed size | 24cm x 12cm |
| Features | R-Value 3.8, recycled Stratus™ R insulation, 75D Recycled Polyester outer fabric with TPU Coating and fluorocarbon-free DWR, two-way valve and pump sack |
Pros
- Super comfortable – at 8cm thick it pads any lumps and bumps and keeps you well off the ground
- Hybrid rectangle shape allows for movement without sliding off the mat
- Very reasonable warmth to weight ratio – perfect for colder nights
- Inflation bag is efficient and quick
Cons
- Inflation valve can be difficult to use (especially with gloves)
- On the heavier side for lightweight adventures like fastpacking or bike packing
- Although small for its insulation value, this is still a large mat when packed down compared to uninsulated options
WHAT I’M LOOKING FOR
Like with all of my outdoor kit, I’m looking for something that is well-made and durable. Simplicity is usually key. This is doubly important for a product like a sleeping mat as a bad night’s sleep is not what anyone wants on their adventure!
FIRST IMPRESSIONS
The mat is heavier than products that I have used before but this is because of the amount of insulation and the heavy duty fabric. But, on first glance the mat seems really well made and looks like it will stand up to a lot of nights out under the stars.
THE TEST
I used this mat in 3 settings: The first was on a four day backpacking trip for work in the Swiss Alps, second an overnight bivy close to home and the third in the back of my van. I have spent about seven nights in total using the product.
This mat was a bit overkill for a summer backpacking trip but as we were not covering huge distances it felt fine to take a bit of extra weight and in turn, have a bit more comfort.
It was lovely to have this mat for a local bivy, again where weight wasn’t an issue. I felt confident putting the mat straight on the ground without a ground sheet, and although it soaked up quite a bit of moisture from the ground, it was thick enough that I stayed dry.
This mat is a great option to have in the back of the van for an impromptu overnighter. Just as comfy as a regular air bed but 10 times smaller!
I felt confident putting the mat straight on the ground without a ground sheet
WHO IS THIS MAT FOR?
This would be a great winter camping mat, or for any trip where weight isn’t a problem (sea kayaking etc). It’s fantastic for car camping and close to home overnight missions.
WHAT STANDS OUT?
DURABILITY
The build quality and fabrics seem like they will stand the test of time.
COMFORT
Well padded, thick and insulated with a hybrid rectangle shape that allows for different sleeping positions and for those who move around!
PACKABILITY
A small package for such a thick, comfy mat.
Well padded, thick and insulated with a hybrid rectangle shape that allows for different sleeping positions
VALUE FOR MONEY
Pretty good value I’d say. It comes in a bit cheaper than the Thermarest equivalent and seems like a product that will last.
BASE BOTTOM LINE
If you’re looking for a super-comfy, warm sleeping mat but you’re not counting every single gram, then this mat would be a great option.
I have had similar thickness mats in the past but I was really happy with how small this packed down compared with other models. My only concern is the plastic cap that is used to plug the mat – it doesn’t seem super-sturdy, but time will tell how it goes.
Although not the lightest mat on the market, Rab do not market it as such – it is a good compromise between warmth, weight and comfort. I would recommend this mat to those who are not looking to go light and fast, but are looking for some comfort on their camping trips. This would also be a great mat for those sleeping in colder conditions. All in all, it performed well and I would definitely recommend this product.
Looking for summer camping essentials?
BASE tests the best camping gear
Spotlight • Hannah Mitchell • July 24, 2023
GAME CHANGERS: The Camping Essentials Checklist For 2023
From basic to boujie, we’ve compiled a list of our camping top tips and best bits of gear to help you adventure better this summer
Review • Francesco Guerra • June 27, 2023
Review: MSR Windburner Stove System
Stable, wind resistant, super reliable solo stove system
Review • Neil Irwin • May 03, 2023
Review: Helinox Tactical Sunset Camping Chair
An investment chair that’s robust, packable and impressively comfy
Review • Hannah Mitchell • April 12, 2023
Review: Petzl Tikkina, Tikka Core and Actik Core Headtorches
We put three of Petzl’s recently revamped lamps to the test
Review • Chris Hunt • February 06, 2023
Review: MSR Hubba Hubba NX 3 Season Tent
MSR’s best selling do-it-all 3 season, 2 person backpacking tent
Review • Hannah Mitchell • January 04, 2023
Review: JetBoil Stash Camping Stove
JetBoil’s lightest stove ever is a small and mighty overnight essential
Don’t miss a single adventure
Sign up to our free newsletter and get a weekly BASE hit to your inbox
Other posts by this author
Review • Sam Hill • Jul 08, 2022
Review: SunGod ULTRAS Sunglasses
The Ultras stay fog-free and glued to your face, however far you run
You might also like
Review • Matthew Pink • Mar 14, 2025
Review: Salomon DRX Defy GRVL running shoe
The Salomon DRX Defy GRVL blurs the line between road and trail, it’s designed to handle the wild without making you feel like you've strapped bricks to your feet.
Review • Matthew Pink • Mar 14, 2025
Review: Gozney Tread portable pizza oven
A gas-fired pizza oven for fine food on the road or in the wild.
Review • Francesco Guerra • Oct 11, 2024
Review: Sea to Summit Ether XT Extreme Sleeping Mat
A sleeping pad offering excellent insulation and comfort for cold-weather camping!
