Mammut Trion Pro 50+7
- Entry-level price point
- Lighter than most bags in the set
- Water resistant treatment with roll-top closure
- Good compressibility
- Thin padding not great for heavy loads
- No exterior water bottles sleeves
- Minimal pivot
The Mammut Trion Pro 50+7 is a great choice for an alpine summit bag or day trip. This application is aided by its light weight and its reliable water resistance. This more-narrow application is also its biggest drawback, with its minimal padding and structure making it inappropriate for heavier loads or longer trips.
The comfort and fit of the Mammut Trion Pro 50+7 is defined by its design as an alpine summit bag; the padding is minimal, which is comfortable with light loads up to 30 pounds and is easy to get on even with a few layers and gloves on. The sternum strap has three settings that can be quickly changed, though only within a narrow range. The frame is flexible and springy, which adds to comfort with light loads but takes away its ability to handle heavier loads.
The main body of the Trion Pro 50+7 has a reliable water resistance treatment and a roll-top closure on top, which inspires confidence during wet conditions. The roll-top closure impacts the upward expandability of the body, but succeeds in keeping the center of gravity low and comfortable. The back sleeve closes with a cinch and runs the length of the bag and is well situated for accessible items such as a hard shell jacket or pants. The brain is easy to remove to save weight but does not convert into a fanny pack.
The Trion Pro 50+7 ranked poorly in this category, notably because of its lack of hip belt pivot. This is especially noticeable when fully loaded. The body of the bag also compresses down well, for use when lightly packed. The body is tall, and when loaded it has a medium center of gravity, which is good, considering this bag is for alpine climbing that requires unimpeded movement.
The Mammut Trion Pro 50+7 has a solid construction. The basic plastic buckles are light but could be a cause for concern when very cold temperatures make plastic brittle. The band that forms the roll top closure is reinforced. The zipper on the brain is small gauge but is covered to add water resistance.
This Mammut bag is packed with extras that aid in its role as an alpine summit bag, such as two smaller gear loops on the back for trekking poles or ice tools, and two larger loops that can accommodate a pair of skis. The brain is easily removed for the most weight-conscious users. The sternum strap has a whistle. The waist strap also has webbing that can be used in the same way as a harness gear loop.
How We Tested It
The packs in this test were used throughout the winter and spring of 2017, during day hikes ranging from a few miles to a summit attempt on Mount Hood. Tests were conducted on Maryland’s Western Shore, in the Olympic Range of Washington State, and in the Cascades of the Pacific Northwest. This geographic diversity of conditions allowed for a look into each pack’s strengths and weakness. Each pack was loaded down with at least 15 pounds.
For more reviews beyond this 2017 test, check out our other backpack tests, our Best 3 Person Backpacking Tents of 2017, along with our sleeping bag tests, and other related hiking and camping gear tests.
The products featured in this test have been loaned to the Gear Institute. For more on our policies regarding editorial objectivity and sample returns, see here.
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- Type of Backpack: Weekend Pack
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