NEMO Mayfly OSMO 3 Lightweight Backpacking Tent Big Agnes Sheep Mountain 4
Head-to-head comparison: specs, scores and expert verdict
NEMO
NEMO Mayfly OSMO 3 Lightweight Backpacking Tent
Best for: Durable, lightweight three-season backpacking.
Big Agnes
Big Agnes Sheep Mountain 4
Best for: Versatile three-season family car camping.
Our Take
Worth flagging before you compare: the NEMO Mayfly OSMO 3 Lightweight Backpacking Tent is a backpacking and the Big Agnes Sheep Mountain 4 is a dome, so these two sit in different shelter categories.
The Big Agnes Sheep Mountain 4 is noticeably taller inside (4'7" peak height versus 3'6"), giving you more headroom to move around.
Floor space is also wider — 66 sq ft versus 40 sq ft for the NEMO Mayfly OSMO 3 Lightweight Backpacking Tent.
The NEMO Mayfly OSMO 3 Lightweight Backpacking Tent and the Big Agnes Sheep Mountain 4 are remarkably well-matched, both scoring 8.1 overall.
The biggest gap is value for money, where the NEMO Mayfly OSMO 3 Lightweight Backpacking Tent holds a clear advantage.
The NEMO Mayfly OSMO 3 Lightweight Backpacking Tent also has a price edge — $230 less at $319 versus $549.
Your best pick will come down to personal priorities, so check the full specs comparison below.
Score Comparison
Pros & Cons
NEMO Mayfly OSMO 3 Lightweight Backpacking Tent
- OSMO fabric stays tight wet
- Huge doors offer easy entry
- Axial anchors make setup simple
- Snag-prone rainfly zippers are frustrating
- Budget PU floor lacks durability
Big Agnes Sheep Mountain 4
- No footprint needed
- Eight mesh pockets
- Durable Oxford polyester
- Hefty 12-pound weight
- Stuff fly doors
Full Specs
| Spec | NEMO Mayfly OSMO 3 Lightweight Backpacking Tent | Big Agnes Sheep Mountain 4 |
|---|---|---|
| Tent Type | Backpacking | Dome, Motorcycle, Backpacking |
| Capacity | 2 people | 2 people |
| Seasons | 3 Season | 3 Season |
| Est. Price | $320 | $550 |
| Weight | 4.1 Lbs | 11lb 13oz |
| Min Trail Weight | — | 11lb 3oz |
| Floor Area | 39.7 ft² | 66.0 ft² |
| Vestibule Area | 8.6 Sq Ft + 8.6 Sq Ft | 12ft² + 12ft² |
| Peak Height | 42 | 55 |
| Doors | 2 | 2 |
| Floor Dimensions | 88 X 68/62 In | — |
| Pole Material | Aluminum | Polyester Ripstop And Nylon Mesh |
| Floor Fabric | — | Polyester Oxford With 1500mm Waterproof Polyurethane Coating |
| Rainfly Fabric | Sil/PU OSMO Poly Nylon Ripstop (1500 Mm) | Polyester Ripstop With 1500mm Waterproof Polyurethane Coating |
| Setup Time | 20 Mins | 10 Mins |
| Warranty | Lifetime | Limited Lifetime |
| Made In | Imported | USA |
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