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Mountainsmith Backpacking Packs

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    MountainsmithZerk 40 Pack
    $219.95
    0 reviews
    Trip Length/Capacity:
    Weekend
    Gear Capacity:
    40 liters
    Weight:
    2.16 lbs
    Features:
    Ultralight
    Reservoir Compatible
  • Text reads: ‘Find more with less. Ultralight backpacking gear’ over an image of two people trekking through rocky terrain.

    Build your ultralight kit

    Go farther with lightweight, durable & packable gear.

  • Two colorful outdoor themed gift cards and a yellow Member Bonus Card for $10 that reads ‘Made for life outside’ on a light colored background.

    Give the gift of the outdoors

    Members, buy a $100+ gift card and get a $10 bonus e-card. Terms apply.

    Shop gift cards
  • A backpacker sits down next to their pack and drinks from their water bottle.

    expert advice

    Ultralight backpacking gear checklist

    Whether you’re a seasoned ultralighter or just looking to lighten your load, use this list to guide your trip prep.

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