TentCheck

NEMO Dragonfly OSMO 2P

Floor 88 × 50/45 in, 40 in peak, vestibules 8.6 sq ft + 8.6 sq ft. Drawn to scale from the maker's listing; the grid is 6 in.

Which pads fit

2 regular padsFits

An inch or more to every wall. Sit-up room +3 in.

2 wide padsDoesn't fit

They don't fit side by side: 2 in past the wall.

2 mummy padsFits

An inch or more to every wall. Sit-up room +3 in.

A regular pad and a wide padFits, but tight

Tight, 0.4 in from the wall. Sit-up room +2 in.

Pads side by side at their listed sizes, with the average man (5 ft 9 in) lying on each. "Tight" is under an inch to a wall or the sloping roof: the fabric gives, but a wet wall wets what touches it. Open it in TentCheck to try your own pads, cots and gear, or read how fits are checked.

Where 2 wide pads fit instead

The lightest 2-person backpacking tents where they fit with an inch to every wall.

Check every backpacking tent for 2 wide padsEvery 2-person tent with two wide pads, drawn

Headroom

Roof overheadFloorShare
Anywhere29 sq ft100%
12 in or more27.6 sq ft95%
24 in or more21.7 sq ft75%
36 in or more8.9 sq ft31%

From the modeled roof, not measured. About 36 in is where an average adult sits up straight on a pad: a 35 in sitting height, plus the pad.

The numbers

Floor (listed)88 × 50/45 in, 29 sq ft
Peak40 in (3 ft 4 in)
Vestibules8.6 sq ft + 8.6 sq ft
Sleeps (maker)2
Packed weight53 oz (3 lb 5 oz)
Packed volume6 L
Regular pads that fit2 with an inch to every wall
Sit-up room on a pad, at the peak+4 in for 35 in sitting height
Pitched footprint88 × 100.5 in (7 ft 4 in × 8 ft 4 in), floor and vestibules
Groundsheet to cutAbout 86 × 48/43 in

On the campsite

Floor and vestibules together cover 88 × 100.5 in. On a square tent pad, as campgrounds list them: 8 × 8 ft: doesn't fit; 10 × 10 ft: fits; 12 × 12 ft: fits. Guylines and stakes need more room around that.

For a groundsheet, cut it a little smaller than the floor, about 2 in, so rain running off the fly doesn't collect on it and run under the tent: about 86 × 48/43 in.

Notes

Floor 88 × 50/45 in, 40 in peak set toward the head end, two 8.6 ft² vestibules. NEMO says two regular pads, or a regular plus a wide, fit; a double pad presses on the walls.

Sources

Roof shapes are modeled from the floor, the peak and how the poles hold the walls, not measured. Treat a result within an inch or two as too close to call.