ULA Circuit vs Zpacks Duplex

98 facts in comparison

These products are from different categories (Backpacks vs Camping Gear), so direct comparison may not be meaningful.

Based on 208 Reddit opinions. Close race—Zpacks DuplexZpacks Duplex edges ahead.

208 opinions

Zpacks Duplex leads by 2pts

ULA Circuit

80%

B+

Based on

12 Redditors

ULA Circuit

Limited Data

~$19.69

7 opinions

tldr; Ultralight that carries weight. More features than most UL packs. Best of both worlds.

Check prices

Reddit's Pick

82%

B+

Based on

474 Redditors

Winner

Zpacks Duplex

201 opinions

tldr; The Zpacks Duplex receives mostly positive reviews on Reddit (83% positive across 474 mentions). A solid choice in its category.

Check prices

😌COM

⭐ORG

🔧BUI

100

Points

Score by Category

Comfort & Carry

100%80%

Organization

100%—

Build Quality

100%—

Why is Zpacks Duplex better than ULA Circuit?

Higher Reddit score (82% vs 80%)
Camping gear
Variable price
Check weight

Based on 486 Reddit opinions

Too Close to Call

Reddit prefers the Zpacks DuplexZpacks Duplex

Winning by 2 points (82% vs 80%)

Camping gear

Variable price

Check weight

High confidence (486 mentions)

💬Reddit Sentiment

Based on 486 Reddit mentions

Overall Rating

ULA Circuit

8.0/10

12 mentions

Zpacks Duplex

8.2/10

474 mentions

ORGANIZATION

ULA Circuit10.0/10

Zpacks DuplexN/A

COMFORT

ULA Circuit10.0/10

Zpacks Duplex8.0/10

BUILD QUALITY

ULA Circuit10.0/10

Zpacks DuplexN/A

DURABILITY

ULA CircuitN/A

Zpacks Duplex7.0/10

PORTABILITY

ULA CircuitN/A

Zpacks Duplex7.3/10

WEATHER RESISTANCE

ULA CircuitN/A

Zpacks Duplex6.0/10

⚔️

Head to Head

Topic	ULA Circuit	Zpacks Duplex
Organization	100%	N/A
Comfort	100%	80%
Build Quality	100%	N/A
Durability	N/A	70%
Portability	N/A	73%
Weather Resistance	N/A	60%
Value	N/A	54%
Ease Of Use	N/A	80%

Category Wins

ULA Circuit: 3|Zpacks Duplex: 5

Head to Head

ULA Circuit: 3|Zpacks Duplex: 5

OrganizationULA Circuit

ULA Circuit100%

Zpacks DuplexN/A

ComfortULA Circuit

ULA Circuit100%

Zpacks Duplex80%

Build QualityULA Circuit

ULA Circuit100%

Zpacks DuplexN/A

DurabilityZpacks Duplex

ULA CircuitN/A

Zpacks Duplex70%

PortabilityZpacks Duplex

ULA CircuitN/A

Zpacks Duplex73%

Weather ResistanceZpacks Duplex

ULA CircuitN/A

Zpacks Duplex60%

ValueZpacks Duplex

ULA CircuitN/A

Zpacks Duplex54%

Ease Of UseZpacks Duplex

ULA CircuitN/A

Zpacks Duplex80%

ULA Circuit

80%

82%

Zpacks Duplex

ULA Circuit80%

Zpacks Duplex82%

Close race - Zpacks Duplex edges ahead by 2 points

Key Specs

Spec	ULA Circuit	Zpacks Duplex
Capacity	68 Liters	2-person
Max Load	35 lbs (15.8 kg)	—
Material	400D Robic nylon	Dyneema Composite Fabric (DCF)
Frame System	Carbon fiber and Delrin suspension hoop, aluminum stay	—
Torso Length Range	12 inch - 24 inch	—

Key Highlights

ULA Circuit

🪶 Ultralight capable

⚖️ Carries load well

🥾 Thru-hike proven

🔧 More features

Zpacks DuplexWinner

🏕️ Camping gear

💰 Variable price

⚖️ Check weight

⭐ Quality varies

Topic Battles

ULA Circuit: 3|Tied: 0|Zpacks Duplex: 0

😌Comfort & Carry

ULA Circuit wins

ULA Circuit

100%

Zpacks Duplex

80%

⭐Organization

ULA Circuit wins

ULA Circuit

100%

Zpacks Duplex

—

🔧Build Quality

ULA Circuit wins

ULA Circuit

100%

Zpacks Duplex

—

Based on Reddit sentiment across 3 categories

📈Where They Rank

💬What Redditors Actually Say

What Redditors Say

Best praise vs top criticism for Zpacks Duplex

Best Praise

+13 pts

“I have used Duplexes for more nights than any other tent. DCF floor is fine without a footprint with no abrasion problems that I have noticed. I've used an X-Mid Pro 2 for more than a year. The silnylon is fine, but I use a polycro footprint (about 50 g). I cannot imagine either getting shredded at all even on granite. Besides, DCF is trivially patched. I suspect silnylon is as well. I do carry both DCF patch/tape and silnylon patch in my repair kit.”

r/Ultralight

View

Top Criticism

+6 pts

“That ain't 0.5. If you look at the tent its an old ass duplex that has been patched. Probably sold by an thru hiker (remember that the dcf are supposed to hold one of 6 month hike) and that guy complained when it was shredded.”

r/Ultralight

View

3 more quotes available below

What Redditors Say

Best praise vs top criticism for ULA Circuit

Best Praise

+2 pts

“My most recommended brands are none of those mentioned. ULA, Matador, and Goruck.”

r/Backpacks

View

No negative quotes found

1 more quotes available below

Sentiment Over Time

ULA Circuit

Zpacks Duplex

📈Historical Price Data

ULA Circuit

Zpacks Duplex

ULA Circuit

All-time low: $5.52(2016-02)

Zpacks Duplex

All-time low: $24.99(2023-03)

Which is Better?

Zpacks Duplex Wins

82%

Duplex

80%

Circuit

Close race, but Zpacks Duplex edges ahead by 2 points based on 486 Reddit opinions.

Why Zpacks DuplexWinner

🏕️ Camping gear
💰 Variable price
⚖️ Check weight
More discussed (474 vs 12)

Why ULA Circuit

🪶 Ultralight capable
⚖️ Carries load well

❤️The Love/Hate Breakdown

Sentiment Breakdown

35%Positive

Positive

35%

Neutral

58%

Negative

Based on 474 Reddit opinions

Sentiment Breakdown

58%Positive

Positive

58%

Neutral

42%

Negative

Based on 12 Reddit opinions

Specification Comparison

Spec	ULA Circuit	Zpacks Duplex
Capacity	68 Liters	2-person
Max Load	35 lbs (15.8 kg)	—
Material	400D Robic nylon	Dyneema Composite Fabric (DCF)
Frame System	Carbon fiber and Delrin suspension hoop, aluminum stay	—
Torso Length Range	12 inch - 24 inch	—
Brand	EISCO	Generic
Manufacturer	Eisco	Zpacks
Color	Various	Various
Weight	0.6 Pounds	17.9 oz / 507 g
Height	3.0 inches	Peak height: 48 inches / 122 cm
Style	—	Single-wall, tarp (non-freestanding)
Floor Size	—	45 inch x 75 inch
Doors	—	Two doors
Setup	—	Pitches with two 48 inch (122 cm) Trekking Poles or Tent Poles and 6 to 8 Stakes (each sold separately)

Feature Checklist

ULA Circuit: 5|Zpacks Duplex: 3

Feature	ULA Circuit	Zpacks Duplex
HANDS ON LEARNING \|\| This hands on learning kit is perfect for introducing students to the basics of electricity. This engaging exercise allows them to explore and understand which configurations result in a successful or unsuccessful current path- all while having fun building their kits!
EXPLORE A VARIETY OF CIRCUIT CONFIGURATIONS \|\| Learners will be able to build a variety of circuit configurations, including basic, series & parallel circuits. The end goal is to successfully create a current path that lights up the miniature light bulb
⭐ Quality varies
Durable & Reusable
Check weight
13 PIECE KIT \|\| Kit is comprised of 13 components - two D-cell batteries, 120" of insulated wire, knife switch, two bulb holders, two battery holders and five miniature light bulbs. *Required but not included: Wire Cutter & Stripper, and Multimeter or Voltmeter & Ammeter (used for measuring current behaviors)
Ultralight capable
Carries load well

Features extracted from Reddit highlights and enrichment data

⚔️Head to Head

Metric	ULA Circuit	Zpacks Duplex
Reddit Score	80%	82%
Mentions	12	474
Sentiment	+ 7- 0	+ 167- 34

Where to Buy

ULA Circuit

Price unavailableCheck prices

All-time low was $5.52 on 2016-02

~100 sold/month on Amazon

Zpacks Duplex

Price unavailableCheck prices

All-time low was $24.99 on 2023-03

Prices may vary. We may earn a commission from purchases made through these links.

ULA CircuitCheck prices Zpacks DuplexCheck prices

Frequently Asked Questions

Which is better, Zpacks Duplex or ULA Circuit?

Based on 486 Reddit comments, Zpacks Duplex has a slight edge with 82% positive sentiment vs ULA Circuit's 80%. The difference is small, so both are solid choices.

Should I buy Zpacks Duplex or ULA Circuit?

Both have similar approval ratings (82% vs 80%), so focus on specific features, pricing, and what matters most to you.

What do Redditors love about Zpacks Duplex?

Reddit users highlight: Camping gear. Variable price. Check weight. With 474 mentions and 82% approval, it's a well-regarded choice in the community.

What do Redditors say about ULA Circuit?

Reddit users highlight: Ultralight capable. Carries load well. Thru-hike proven. With 12 mentions and 80% approval, it remains a popular alternative.

How many Reddit reviews were analyzed?

This comparison analyzed 486 Reddit comments: 474 about Zpacks Duplex and 12 about ULA Circuit. Data was sourced from Backpacks community discussions.

How accurate are these ratings?

Our sentiment analysis is approximately 80-85% accurate compared to manual review. Well-discussed products with many mentions tend to have more reliable scores than niche items with fewer data points.

Why trust Reddit over professional reviews?

Reddit users bought products with their own money and have no incentive to mislead. You're seeing hundreds of real opinions across different use cases, not just one reviewer's take. This crowdsourced approach surfaces both common praise and recurring complaints.

208 Reddit opinions analyzed · Last updated 5/26/2026

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