Mountainsmith
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Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking
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Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking
The Zerk 25 pack stands alone as the ideal combination of weight, durability, comfort, and accessibility.
Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking
Item #: 82463454

Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking

90% of respondents would recommend this to a friend

Item #: 82463454

FJD 562

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*All items will import from US

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The Zerk 25 pack stands alone as the ideal combination of weight, durability, comfort, and accessibility.
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What Stands Out

Ultralight Design
Weighing just under two pounds, this backpack prioritizes portability, making it perfect for long hikes where every ounce matters while maintaining structural integrity and comfort.
Spacious Capacity
With a generous 40-liter capacity, this backpack offers ample space for all your hiking essentials, ensuring you can pack for short or extended trips without sacrificing organization.
Durable Materials
Constructed from high-quality, weather-resistant fabrics, the Zerk backpack ensures longevity and protection against the elements, providing excellent value for outdoor enthusiasts looking for reliability.

Product Details

Shop Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking online at a best price in Fiji. B0CV64J2BT
Other Special Features of the ProductModular Customization, Trail Runner Style Straps
Recommended Uses For ProductLeisure, Sport
Strap TypeShoulder Strap, Waist Strap
Apparel Closure TypeRoll Top
Number Of Pockets8
Number of Compartments7
Backpack Harness TypeVest Harness
Maximum Weight Recommendation25 pounds (11.34 kg)
Fit to Size SentimentPositive
Material Type100D Robic X-Grid, Extreema Ripstop, UTS Coating, Nylon 100D x 840D Stretch Mesh, Atilon & EVA
Outer Material100D Robic X-Grid, Extreema Ripstop, UTS Coating; 210D Robic X-Grid, Extreema Ripstop, UTS Coating
Shell TypeSoft Shell
Apparel Fabric Weight ClassLightweight
Storage Volume20 liters
Item Dimensions D x W x H9"D x 12"W x 9"H (22.9 x 30.5 x 22.9 cm)
Item Weight8 pounds (3.63 kg)
Unit Count1 Count
Size20L
Backpack Harness SizeMedium
ColorDarknight
Backpack DesignFramed Backpack
Sport TypeHiking
PatternSolid
Product StyleModern
Brand NameMountainsmith
Age Range DescriptionAdult
Number of Items1
UPC757894334369
ManufacturerMountainsmith

Who Should Buy?

Suitable For
  • Long-Distance Hikers

    Ideal for hikers seeking a lightweight, durable option for extended trips with ample 40 liters of storage.

  • Minimalist Backpackers

    Perfect for users who prioritize efficiency and minimal weight in their hiking gear without sacrificing essential functionality.

  • Day Trip Enthusiasts

    Great for short excursions where moderate packing space is needed for essentials without the bulk of larger packs.

Not Suitable For
  • Heavy Load Carriers

    Users needing to carry heavy gear may require a more robust pack with better support and cushioning.

Product Description

Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is the weight of the Mountainsmith Zerk Ultralight Hiking Backpack?

    Answer: The Mountainsmith Zerk Ultralight Hiking Backpack weighs approximately 2 pounds, making it an excellent choice for those looking to minimize pack weight on long hikes. This lightweight design is strategic, allowing hikers to carry essential gear without compromising on comfort. Practical scenarios include multi-day backpacking trips where every ounce counts, or day hikes where you want to keep your load manageable while ensuring ample space for your essentials.
  • Question: What materials are used in the construction of the Zerk Ultralight Backpack?

    Answer: The Zerk Ultralight Backpack is made from durable ripstop nylon, which is known for its resilience and tear-resistant properties. This choice of material not only ensures longevity but keeps the backpack lightweight. It's particularly beneficial in rugged outdoor environments where abrasions are common, such as rocky trails, ensuring that your backpack can withstand the elements as you enjoy your adventure.
  • Question: Is the Mountainsmith Zerk Backpack suitable for both men and women?

    Answer: Yes, the Mountainsmith Zerk Ultralight Hiking Backpack is designed to be unisex, featuring adjustable straps and a flexible suspension system that accommodates varying body types. This makes it an ideal backpack for couples or groups, as it can be effectively shared or adjusted for different users. Whether you are hiking in a mixed-gender group or looking for a versatile pack, the Zerk provides a comfortable fit for everyone.
  • Question: How much storage capacity does the Zerk backpack provide?

    Answer: The Zerk backpack provides 40 liters of storage capacity, which is perfect for carrying gear for weekend trips or longer hikes. This spacious interior includes multiple compartments and pockets for organization, ensuring that you can pack efficiently. Ideal use cases are weekend camping trips where you need to bring sleeping gear, clothes, and food, without sacrificing ease of access to your essentials.
  • Question: What type of hydration system can be used with the Zerk Ultralight Backpack?

    Answer: The Mountainsmith Zerk Ultralight Backpack is compatible with most hydration reservoirs, featuring a designated sleeve for the hydration bladder and an outlet for tubing. This design allows for hands-free hydration while on the go, keeping you well-hydrated during your hike. This is especially useful for long treks where stopping to access water sources isn't feasible, enhancing your overall hiking experience.
  • Question: Are there any special features included in the design of the backpack?

    Answer: Yes, the Zerk Ultralight Backpack comes with features such as adjustable sternum straps, a removable hip belt, and multiple gear loops. These design elements enhance comfort and usability by allowing for personalized adjustments and gear attachments. For example, the removable hip belt helps relieve pressure on longer hikes, making it an ideal choice for backpackers who prioritize comfort during extended excursions.
  • Question: What are the dimensions of the Mountainsmith Zerk Ultralight Backpack?

    Answer: The backpack measures approximately 22 x 12 x 10 inches, providing a compact silhouette while still allowing ample interior space. These dimensions strike a balance between maneuverability and capacity, making it suitable for both tight trails and broad open spaces. This versatility means you can confidently take the Zerk on various terrains, ensuring a great fit for diverse outdoor adventures.
  • Question: Is the Zerk Ultralight Backpack water-resistant?

    Answer: The Zerk Ultralight Backpack features a water-resistant coating that helps protect your gear from light rain and splashes. This is not a fully waterproof design, but it's a significant advantage during unexpected weather changes. Perfect for those hiking in spring or autumn when showers can occur, you can have peace of mind knowing that your essentials are somewhat shielded from moisture.
  • Question: Can the Zerk be used for activities other than hiking?

    Answer: Absolutely! The versatile design of the Mountainsmith Zerk Ultralight Backpack makes it suitable for various outdoor activities beyond hiking, such as biking, traveling, or even day trips. With its adjustable compartments and a hydration system, it's an adaptable choice whether you're cycling through trails or exploring new cities on foot. This multipurpose use enhances your investment in the backpack.
  • Question: Where can I buy the Mountainsmith Zerk Ultralight Hiking Backpack, 40 Liter, Black in Fiji?

    Answer: You can purchase the Mountainsmith Zerk Ultralight Hiking Backpack, 40 Liter, Black on Ubuy, which offers a convenient online shopping experience with a wide range of outdoor gear.

Mountainsmith Internal Frame Backpacks Editorial Review

Mountainsmith Zerk Backpack - Darknight - 20L | Lightweight with Running Vest Style Straps, For Hiking, Backpacking, Trekking, Thru-Hiking is an excellent choice for outdoor enthusiasts looking for comfort and functionality. With its modular customization and trail runner style straps, it distributes weight efficiently across your upper body, making it ideal for fast packing in the mountains. Reviewers praised its multiple pockets, which allow easy access to gear without removing the pack, along with the spacious storage volume of 20 liters. However, some users noted that the design could lead to sweating against the back due to limited airflow, which may affect comfort during extended use.

Customer Reviews & Ratings

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Pros

  • Lightweight design enhances user comfort
  • Pockets accessible without removing the pack
  • Efficient weight distribution with vest style straps
  • Multiple attachment points for gear
  • Great for fast packing and day trips

Cons

  • Limited airflow may cause sweat buildup

Platform Trust & Buyer Confidence

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4.2/5 9250 + reviews
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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”

23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”

22-Jul-26 · via Trustpilot
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”

23-Jul-26 · via Trustpilot
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Onesi
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”

22 July 2026 · via Trustpilot
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SAO JOHN
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”

23 July 2026 · via Trustpilot
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Important information

  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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FJD 562

Order now and get it around Thursday, September 03

QTY:

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Features & Benefits

  • Weighs only 1.7 lbs for ultralight hiking.
  • Holds up to 23 liters of gear in a spacious main compartment.
  • Features large side water bottle pockets for easy access.
  • Designed with reflective elements for low light visibility.
  • Includes a removable waistbelt and a rigid interior frame for comfort.
  • Co-designed with a seasoned thru-hiker for optimal performance.

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