The Copper Spur HV UL2 is one of the most-reviewed ultralight tents ever made, while the REI Half Dome SL 2+ offers more livable space at a gentler price. Backpacker Magazine calls the Copper Spur a perennial top pick; REI's own tent beats it on floor space and price but gives up a full pound in the process.
Big Agnes Copper Spur HV UL2
The Copper Spur HV UL2 wins for serious backpackers counting ounces; the Half Dome SL 2+ is better value for occasional trips.
Specs Comparison
| Spec | REI Co-op Half Dome SL 2+ | Big Agnes Copper Spur HV UL2 |
|---|---|---|
| MSRP | ~$299 | ~$549 |
| Weight (packed) | 3 lbs 9 oz | 2 lbs 11 oz |
| Floor Area | 29.7 sq ft | 28.7 sq ft |
| Peak Height | 42 in | 40 in |
| Fly Rating | 1500mm / 40d | 1200mm / 15d |
| Doors | 1 | 2 |
Weight and Packability
The Copper Spur HV UL2 weighs about 2 lbs 11 oz — genuinely light for a double-wall freestanding tent for two. The REI Half Dome SL 2+ comes in around 3 lbs 9 oz, which is still reasonable but a noticeable step heavier.
On a week-long trip, that pound adds up, especially if you're splitting the carry with a partner.
Livability and Headroom
The Copper Spur's hub design creates vertical walls and generous headroom — 40 inches at the peak — for a tent under 3 lbs. It feels larger inside than the numbers suggest.
The Half Dome SL 2+ has more floor area (29.7 sq ft vs 28.7 sq ft) and is easier to sit up in for taller users. For two people sharing on a wet evening, the extra space is appreciated.
Weather Resistance
Big Agnes uses a 15d ripstop fly on the Copper Spur with a 1200mm waterproof rating — light but tested in real storms per r/Ultralight trip reports. The REI's fly is 40d and rated to 1500mm, which gives it more confidence in heavy rain.
For shoulder-season backpacking with potential storms, the Half Dome's heavier construction is reassuring. In benign conditions, the Copper Spur handles everything.
Price
The Copper Spur HV UL2 retails around $549. The REI Half Dome SL 2+ is around $299 — nearly half the price for a tent that does the job for most weekend backpackers.
The gap is significant. Unless you're doing serious mileage and every ounce counts, the REI delivers strong value.
REI Co-op Half Dome SL 2+ Strengths
- More floor area (29.7 sq ft) for two people to spread out
- 40d fly fabric handles heavy rain with more confidence
- Nearly half the price of the Copper Spur
Big Agnes Copper Spur HV UL2 Strengths
- Weighs about a pound less — significant on long trips
- Hub design creates excellent headroom for the weight
- Two doors and two vestibules for each person's gear
REI Co-op Half Dome SL 2+ Weaknesses
- About 14 oz heavier than the Copper Spur
- Only one door on most configurations — awkward for two people
Big Agnes Copper Spur HV UL2 Weaknesses
- 15d fly and floor are thin and require careful site selection
- $549 is a serious investment for weekend campers
- Lighter fabrics show wear faster in rocky terrain
Best For
- a: Weekend backpackers and beginners who want space and value
- b: Serious thru-hikers and ultralight backpackers who count every ounce
FAQ
Is the Copper Spur HV UL2 truly two-person?
It fits two people but is snug for two adults with gear. Most reviewers call it an honest two-person tent for couples or friends comfortable sharing space.
Does the REI Half Dome SL 2+ come with a footprint?
No — both tents sell footprints separately. At the REI's price, a footprint is a worthwhile add-on to protect the floor.
How do they handle condensation?
Both are double-wall tents with mesh inners that minimize condensation transfer. The Copper Spur's larger vents handle airflow slightly better in still air.