Gossamer Gear Mariposa 60 vs Gossamer Gear Gorilla 50
vs
Quick take: The Gossamer Gear Gorilla 50 costs $40 less; the Gossamer Gear Mariposa 60 carries more (60 vs 50 liters); the Gossamer Gear Gorilla 50 is lighter (2 vs 2.14 lbs).
| Spec | Gossamer Gear Mariposa 60 | Gossamer Gear Gorilla 50 |
|---|---|---|
| Price | $315 | $275 |
| Rating | — | — |
| Type | Ultralight Pack | Ultralight Pack |
| Frame Type | Internal Frame | Internal Frame |
| Capacity | 60 L | 50 L |
| Weight | 2.14 lbs | 2.0 lbs |
| Max Load | 35 lbs | 30 lbs |
| Torso Fit | Sized S-L, 14.5-21.5 in | Sized S-L, 14.5-21.5 in |
| Material | 100D and 210D recycled Robic nylon | 70D and 100D recycled Robic nylon |
| Back Panel | Aluminium hoop with removable SitLight foam pad | Removable SitLight foam pad with aluminium stay |
| Adjustable torso | No | No |
| Ventilated back | No | No |
| Raincover included | No | No |
| Hipbelt pockets | Yes | Yes |
| Removable lid | No | No |
| Hydration sleeve | Yes | Yes |
| Fits BV500 bear can | Yes | Yes |
| Warranty | Gossamer Gear limited lifetime | Gossamer Gear limited lifetime |
Pros & cons
Gossamer Gear Mariposa 60
- ✓The seven-pocket layout is the best organization in ultralight — fans say they touch the main compartment twice a day, morning and night.
- ✓The tall side pocket holds a full tent separately from dry gear, the single most-praised design choice.
- ✓The removable back pad doubles as a sit pad, saving carrying a separate one.
- ✓Robic nylon at 100/200 denier hits a durability sweet spot documented across thousands-of-miles reports.
- ✓Hipbelt sizing is independent of torso sizing, giving semi-custom fit from stock parts.
- ✓Carries 30-35 lbs comfortably with the stay in — honest rating per long-term reviews.
- ✓The Austin-based company's customer service and repair culture draw consistent praise.
- ✓Fits a BV500 horizontally at the top of the bag, which many 60L UL packs can't.
- ✗The asymmetric layout is polarizing — packing balanced weight takes practice and annoys symmetry-lovers.
- ✗The foam back pad ventilates poorly and soaks sweat on climbs.
- ✗The single aluminum stay twists under 35+ lb loads; it's not a heavy hauler.
- ✗Mesh pockets abrade in brush faster than solid-face rivals.
- ✗No top lid and a floppy over-the-top strap system that takes fiddling to compress well.
- ✗Fixed torso sizes with online-only sizing risk.
- ✗At $315 it's priced above the Circuit while carrying slightly worse at max load.
- ✗The hipbelt foam softens noticeably after a full thru-hike, per multiple finishers.
Gossamer Gear Gorilla 50
- ✓The archetypal 'graduation pack' — the r/Ultralight cliché is buying a Mariposa, shrinking your kit, then buying a Gorilla.
- ✓Under 2 lbs with a real stay and hipbelt, it carries 30 lbs honestly — better than frameless rivals at similar weight.
- ✓Symmetric pockets fix the Mariposa's polarizing layout while keeping generous capacity.
- ✓The removable sit-pad back panel remains one of the smartest dual-use designs in UL.
- ✓Robic fabric durability matches its big sibling's strong track record.
- ✓Mixed torso/hipbelt sizing gives semi-custom fit off the shelf.
- ✓A BV450 fits cleanly; careful packers manage a BV500 vertically.
- ✓Gossamer Gear's service reputation applies here too.
- ✗50 liters is tight for bear-canister trips or 5+ day food carries — buyers routinely wish for 5 more liters.
- ✗Same sweaty foam back as the Mariposa.
- ✗The 30 lb ceiling is real; water-heavy desert carries overload it.
- ✗Fixed sizes, online-only fitting.
- ✗Mesh pockets remain the wear point in brush.
- ✗The hipbelt is minimal and divides opinion at the top of the load range.
- ✗No lid, no organization beyond the pocket array.
- ✗Price sits close enough to the Circuit that many first-time buyers default to ULA's bigger volume instead.