NEMO Mayfly OSMO 3 Lightweight Backpacking Tent Kelty Grand Mesa 4 Tent
Head-to-head comparison: specs, scores and expert verdict
NEMO
NEMO Mayfly OSMO 3 Lightweight Backpacking Tent
Best for: Durable, lightweight three-season backpacking.
Kelty
Kelty Grand Mesa 4 Tent
Best for: Affordable three-season backpacking and car camping.
Our Take
Worth flagging before you compare: the NEMO Mayfly OSMO 3 Lightweight Backpacking Tent is a backpacking and the Kelty Grand Mesa 4 Tent is a dome, so these two sit in different shelter categories.
The Kelty Grand Mesa 4 Tent is noticeably taller inside (4'7" peak height versus 3'6"), giving you more headroom to move around.
Floor space is also wider — 53 sq ft versus 40 sq ft for the NEMO Mayfly OSMO 3 Lightweight Backpacking Tent.
The Kelty Grand Mesa 4 Tent also offers significantly more vestibule space — 19 sq ft versus 9 sq ft.
Both score 8.1 overall, though the Kelty Grand Mesa 4 Tent wins more individual scoring categories.
The main tradeoff: the NEMO Mayfly OSMO 3 Lightweight Backpacking Tent leads on ease of setup despite trailing overall.
The Kelty Grand Mesa 4 Tent also has a price edge — $95 less at $224 versus $319.
Your best pick will come down to personal priorities, so check the full specs comparison below.
🏆 Our pick: The Kelty Grand Mesa 4 Tent scores higher overall.
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
Kelty Grand Mesa 4 Tent
- Lightning-fast Quick Corner setup
- Durable aluminum press-fit poles
- Oversized Shark Mouth bag
- Single entry door
- Cramped for four
Full Specs
| Spec | NEMO Mayfly OSMO 3 Lightweight Backpacking Tent | Kelty Grand Mesa 4 Tent |
|---|---|---|
| Tent Type | Backpacking | Dome, Backpacking |
| Capacity | 2 people | 2 people |
| Seasons | 3 Season | 3 Season |
| Est. Price | $320 | $225 |
| Weight | 4.1 Lbs | 7 Lbs 7 Oz |
| Floor Area | 39.7 ft² | 53.3 ft² |
| Vestibule Area | 8.6 Sq Ft + 8.6 Sq Ft | 18.8 Sq Ft |
| Peak Height | 42 | 55 |
| Doors | 2 | 1 |
| Floor Dimensions | 88 X 68/62 In | 96 X 80 In |
| Pole Material | Aluminum | Aluminum DAC Pressfit |
| Floor Fabric | — | Coated Nylon Taffeta |
| Rainfly Fabric | Sil/PU OSMO Poly Nylon Ripstop (1500 Mm) | Coated Polyester Taffeta |
| Setup Time | 20 Mins | 5 Mins |
| Warranty | Lifetime | Limited Lifetime |
| Made In | Imported | Imported |
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