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Zpacks Duplex vs Big Agnes Copper Spur HV UL2 (2026)

The Zpacks Duplex at 1 lb 1oz is in a different weight class from the Copper Spur at 2 lb 10oz. You pay $149 more for the Duplex and accept a tent that requires trekking poles to pitch. Whether that trade-off makes sense depends entirely on how you hike.

By William • Updated May 2026

Lightest Option
Zpacks Duplex
$699
Weight1 lb 1oz / 510g
MaterialDyneema Composite Fabric (DCF)
PitchingTrekking poles required
Floor Area28 sq ft
Doors2
Weather3-season
9.0
/10
TrailCraft Score
Full Review →
Best Overall
Big Agnes Copper Spur HV UL2
$550
Weight2 lb 10oz / 1.19kg
MaterialSilnylon / ripstop nylon
PitchingFreestanding (included poles)
Floor Area29 sq ft
Doors2
Weather3-season
9.3
/10
TrailCraft Score
Full Review →
Bottom line: Weight: Zpacks Duplex wins by 25oz — a full 1.5 lbs. Ease and versatility: Big Agnes Copper Spur wins. Budget: Copper Spur at $550 vs $699. The Duplex is for hikers who have committed to ultralight. The Copper Spur is for hikers who want a great lightweight tent without the trade-offs.

Head-to-head: key differences

Weight
Zpacks Duplex1 lb 1oz — 25oz lighter than Copper Spur
HV2 lb 10oz — excellent but a full pound heavier
The Duplex weight advantage is the largest between any two tents in this category. Significant on a thru-hike.
Pitching
Zpacks DuplexRequires trekking poles — not freestanding
HVFreestanding — pitches anywhere without poles
If you always hike with poles: Duplex is fine. If you sometimes leave poles behind or camp on platforms: Copper Spur.
Price
Zpacks Duplex$699 — $149 more expensive
HV$550 — better value
Zpacks DCF material is expensive. The Copper Spur is better value for performance delivered.
Durability
Zpacks DuplexDCF is tear-resistant but punctures from abrasion
HVRipstop nylon is more abrasion-resistant for rough terrain
Long-term durability edge to Copper Spur. Duplex owners are careful with site selection.
Choose Zpacks Duplex if:
  • →AT thru-hike or long-distance section hiking
  • →Every ounce counts in your pack weight philosophy
  • →You always use trekking poles
  • →Budget is secondary to weight
Choose Big Agnes if:
  • →3-season backpacking without ultralight obsession
  • →You want freestanding capability
  • →$550 is the right tent price point
  • →Camping on shelter platforms or rocky ground

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Common Questions

How much lighter is the Zpacks Duplex than the Big Agnes Copper Spur?
The Zpacks Duplex is 1 lb 1oz versus the Copper Spur HV UL2 at 2 lb 10oz — a 25-ounce (1 lb 9oz) difference. The Duplex is roughly 57% lighter.
Is the Zpacks Duplex worth the extra $149?
For long-distance hikers committed to ultralight: yes. Saving 25oz of shelter weight has a compounding effect over hundreds of miles. For weekend backpackers: the Copper Spur delivers excellent performance at $550 without the Duplex's limitations.
Can you pitch the Zpacks Duplex without trekking poles?
Technically yes with aftermarket carbon struts ($65) — but it is designed for trekking poles. The Copper Spur is fully freestanding with its own poles.
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