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Mammut Trion 50L Backpack


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Trion 50L Backpack

The Trion collection consists of Mammut's versatile range of backpacks built for trekking and mountaineering, and the Trion 50L Backpack is the second-largest pack in that backpack. Its Contact U Frame consists of cushy EVA and air channels for four-season ventilation. The waist belt is removable customized support if you're carrying a lighter load. There are external attachments for skis, ice axes, trekking poles, and even climbing ropes. The Trion 50L is compatible with hydration reservoirs, and there are multiple pockets to organize smaller valuables.
  • Backpack built for multi-day treks and mountaineering
  • 50L capacity is the second-largest backpack in the Trion collection
  • Top and back panel access points to main compartment
  • Contact U Frame includes cushy EVA with air channels for ventilation
  • Removable waist belt customizes stability and support
  • Attachments for skis, ropes, ice axes, and trekking poles
  • Hydration compatible with reservoirs
  • Item #MAM01BM

50L (3051cu in)
Contact U Frame
Shoulder Straps
EVA padded, adjustable, sternum
Waist Belt
detachable, padded, adjustable
Hydration Compatible
Reservoir Included
top, back panel
2 mesh shoulder straps, 1 zippered front, 1 zippered internal, 1 zippered waist belt
Ice Axe Carry
Trekking Pole Carry
26 x 12.5 x 11in
Claimed Weight
3lb 6oz
Recommended Use
backpacking, mountaineering
Manufacturer Warranty
2 years

Tech Specs

What do you think about this product?


>Rating: 5

GREAT pack (not for small people)

I've used it once or twice and have initial impressions

I love all the features on this pack! It has a lot of well-designed pockets and accessories. I particularly appreciate the separate front pocket (which is actually why I bought it) as I really appreciate having my winter backcountry gear accessible and not having to worry about digging for my shovel/probe. Only issue I find with the pack is the sizing. I'm 5'7". So, not particularly small, but the pack is designed for people with a larger torso. As far as I could tell, Marmut has packs better for smaller torsos, but not in this 50l capacity. So, I've made it work, but if you're tiny, try something different?

The pack fit is awkward to me as well. The chest strap is still loose even after cinching it all the way down as tight as it will go. I am 6'0" and 155 lbs. Unfortunate because it is otherwise an excellent pack.


Is this made from the same 5000 mm water-resistant fabric as the previous Trion Pro 50+7?