Gearnalysis

Gossamer Gear Mariposa 60 vs. Osprey Eja 58

A close look at two backpacks buyers cross-shop. The Mariposa 60 takes a modest overall edge, led by low weight, but the Eja 58 has its own case.

Gossamer Gear
Mariposa 60
68GearScore
60L · Ultralight
wins 2 specs
Osprey
Eja 58
65GearScore
58L · Backpacking
wins 1 spec
Check price at REI
Gossamer Gear Mariposa 60Osprey Eja 58
GearScore68✓65
Capacity60 L58 L
Weight2 lb 2 oz✓2 lb 13 oz
Rated load35 lb35 lb
Fabric denier100 D100 D
Price$315$285✓
TypeUltralightBackpacking
FrameInternalInternal

Highlighted cells mark the better spec: Mariposa 60 in blue, Eja 58 in amber. A blank spec is never counted as a win. Capacity is shown for context and is not scored, since more volume is a sizing choice rather than better. GearScore is the overall rating (0 to 100); re-weight it on the full backpack comparison. Prices are current MSRP.

Put the Gossamer Gear Mariposa 60 next to the Osprey Eja 58 and the trade-offs are clear. The Mariposa 60 wins on low weight, and the Eja 58 pushes back on price.

The Mariposa 60 is 11 oz lighter. The Eja 58 is $30 cheaper. On the default GearScore the Mariposa 60 leads 68 to 65.

Pick the Mariposa 60 if you care most about low weight, which makes it the better call for counting grams on long miles. Pick the Eja 58 if price matter more to you, or you are focused on getting the most for your money.

Common questions

Which is lighter?

The Gossamer Gear Mariposa 60. It is 11 oz lighter than the Eja 58.

Which is cheaper?

The Osprey Eja 58. It is $30 cheaper than the Mariposa 60.

Which has the higher GearScore?

The Gossamer Gear Mariposa 60, 68 to 65 on the default algorithm. You can re-weight the factors to match your trip.

Mariposa 60 or Eja 58, which should you buy?

It depends on your priorities. Go with the Mariposa 60 for low weight, or the Eja 58 for price. The spec table above shows exactly where each wins.