Mission 55 Backpack

Sale price$329.95 USD

Only 2 units left
Color: Cobalt
Size: Small/Medium
Sizing: Black Diamond Backpacks

Black Diamond Pack Size Charts

How to Measure
Torso: From the base of the neck to the narrowest part of the waist.
Waist: Around the narrowest part of the waist


S/M IN CM
Torso 16-19 41-48
Waist 26-40 66-102

M/L IN CM
Torso 18.5-21.5 47-55
Waist 28-45 71-114

Unisex Small IN CM
Torso 15.5-18.5 40-47
Waist 27-32 69-81

Unisex Medium IN CM
Torso 17.5-20.5 45-52
Waist 29-34 73-86

Unisex Large IN CM
Torso 19.5-23.5 50-57
Waist 34-39 86-99

Men's Medium IN CM
Torso 17.5-20.5 45-52
Waist 29-34 73-86

Men's Large IN CM
Torso 19.5-23.5 50-57
Waist 34-39 86-99

Women's Small IN CM
Torso 15.5-18.5 40-47
Waist 27-29 69-74

Women's Medium IN CM
Torso 17.5-20.5 45-52
Waist 29-31 74-79

Tough enough for the most demanding alpine objectives.

The Mission 55 Backpack is Black Diamond’s toughest alpine pack, dedicated to ice cragging, mixed ascents, and cold-weather expeditions. This workhorse balances the load-hauling comfort needed for the approach with a strippable design that sheds weight for the technical push to the summit. With a suspension system that moves with your body and dedicated storage for tools and crampons, it streamlines your transition from base camp trekker to vertical climber.

Pickup available at Whittaker Mountaineering

Usually ready in 24 hours

Mission 55 Backpack

Mission 55 Backpack

Cobalt / Small/Medium

Whittaker Mountaineering

Pickup available, Usually ready in 24 hours

30027 SR 706 E
Ashford WA 98304
United States

+18002385756
Free Shipping
On orders over $150
Expert Guidance
Real mountain guides, not algorithms
Easy Returns
30 days, no hassle returns
Guide Vetted
Curated by RMI professionals

Diggin' in to Details

Our Take

The Mission 55 is the pack we grab when durability is non-negotiable. We love how the "strippable" design lets you haul a heavy load to base camp comfortably, then shed the lid and hipbelt to climb light and fast on summit day. It’s a true workhorse that handles sharp screws, axes, and crampons without flinching.

Our Philosophy

We Simplify Outfitting

Whittaker Mountaineering was born out of the need for RMI to make sure their clients had the appropriate gear to get to the top of Mt. Rainier safely. After decades of trying, reviewing, arguing-over, and recommending gear, we can’t help but know what we’re doing by this point. We know what works, we know what doesn’t, and we use that expertise to stock our store. 

Who are these guys?

Black Diamond

Black Diamond has been outfitting mountain professionals for decades, building gear that’s tested on real climbs, not just in labs. We carry Black Diamond because their designs consistently deliver dependable performance where it matters most.

See More From Black Diamond
Best For

Alpinists, ice climbers, and mountaineers tackling multi-day objectives in rugged terrain.

Activities
  • Mountaineering
  • Hiking
  • Backpacking
  • Ski Mountaineering
Fit

This pack features a streamlined, body-hugging shape ensuring a stable carry on technical terrain.

What's the diff?

Product Comparison

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Best For

Alpinists, ice climbers, and mountaineers tackling multi-day objectives in rugged terrain.

Extended alpine expeditions, mountaineering, glacier travel, ski mountaineering, or any trip requiring high carrying capacity and adaptable load configuration

Alpinists, climbers, and ski mountaineers who need a large-volume, tough, mission-ready pack.

Summits
  • Rainier (Standard Climb)
Activities
  • Mountaineering
  • Hiking
  • Backpacking
  • Ski Mountaineering
  • Mountaineering
  • Backpacking
  • Ski Mountaineering
  • Ice Climbing
  • Mountaineering
  • Backpacking