Specifications

Brand : Mountainsmith

Model # : mahyem45-m

Loc : CD

Gender : Mens

Pack Volume : 40-59L

Material:

  • 210d HT Nylon w/ 200d SPECTRA® R/S
  • 210d Nylon Embossed Liner
  • 2mm Spring Steel

Volume: 44L

  • Dimensions: 26" x 11.5" x 8.25" (H x W x D)
  • Torso size: 16" - 20"
  • Waistbelt: 28" - 48"

Weight: 1.33 kg

The Mountainsmith Mayhem 45 Men's Pack integrates spectra fiber for unmatched strength and lightness, setting a new standard in durability and weight efficiency for backpacking gear. This pack is tailored for a wide range of outdoor activities, from weekend backpacking trips and backcountry hut adventures to crag outings and extended travel. With its hex-ridged Ethylene-Vinyl Acetate (EVA) back panel padding, it ensures comfort and ventilation over long distances. The unique sock-style shoulder strap and dual-density EVA/Polyurethane-laminated (PU) shoulder straps with load lifter adjustment provide an ergonomic fit, distributing weight evenly for optimal comfort. The interfaced waistbelt system, complemented by ventilated waistbelt padding and stretch mesh waistbelt pockets, offers additional support and accessibility. For storage, the front panel expansion pocket, top lid zippered compartment with a secondary pocket, and side panel mesh bottle pockets with over and under strap pass-thru provide ample space and organization. The pack's versatility is enhanced by daisy chain attachment loops, a built-in haul handle, and dual tool/trekking pole carry with elastic pole tip loops, alongside ice & mixed tool lower panel pass-thru sleeves for various gear hauling options.

Key Features:

  • Ultra Lightweight: 1.33kg, optimized for balance and portability.
  • Dimensions: 44L, 66 x 29.2 x 20.9 cm
  • Spectra Fiber: For unparalleled durability and lightness.
  • Hex-ridged EVA back panel padding: For comfort and ventilation.
  • Ergonomic Weight Distribution and Anatomically Correct Fit: Sock-style shoulder strap and dual-density EVA/PU shoulder straps with load lifter adjustment.
  • Adjustable Fit: Interfaced waistbelt system with forward pull waistbelt and side adjustment webbing (71 - 121.9cm).
  • Enhanced Comfort and Accessibility: Ventilated waistbelt padding and stretch mesh waistbelt pockets.
  • Additional Storage: Front panel expansion pocket and daisy chain attachment loops.
  • Organised Storage: Top lid zippered compartment with secondary pocket and side panel mesh bottle pockets.
  • Versatility in Gear Hauling: Built-in haul handle and dual tool/trekking pole carry.
  • Specialised Gear Accommodation: Ice & mixed tool lower panel pass-thru sleeves.

Specifications

Brand : Mountainsmith

Model # : mahyem45-m

Loc : CD

Gender : Mens

Pack Volume : 40-59L

Material:

  • 210d HT Nylon w/ 200d SPECTRA® R/S
  • 210d Nylon Embossed Liner
  • 2mm Spring Steel

Volume: 44L

  • Dimensions: 26" x 11.5" x 8.25" (H x W x D)
  • Torso size: 16" - 20"
  • Waistbelt: 28" - 48"

Weight: 1.33 kg

Free shipping on orders over $100 to Australia & NZ*
Shipping on small orders (under $100) only $9.95
Express shipping to Australia & NZ only $15

Shipping Options

Standard Shipping (AU/NZ) – FREE on orders over $100 and $9.95 on orders under $100. Orders are dispatched within 1 business day. Click here for shipping delivery times

Select ‘Standard Shipping – Auspost Only’ if you would prefer your parcel is sent with Auspost. Otherwise it will be shipped with any of our available carriers. Auspost Only shipping is not available on some very heavy/bulky orders.

Express Shipping (AU/NZ) – Need it faster? Express Shipping is available for $15. Express Shipping is not available on heavy/bulky orders. Orders placed before midday on business days are usually dispatched same day (otherwise within 1 business day). Delivery times in the table below.

Click and Collect – Shop online and collect in our Milton, Brisbane store, free for all orders. Orders are usually ready within 2 hours (during opening hours). Click here for address and opening hours.

Terms and conditions apply, click here for a full overview of our shipping policies

Manufacturing defects covered, may be repaired or replaced (one time only).

At a glance:

  • If you have selected the wrong product/size for you, or want to exchange/return for any reason except for warranty or our error, this is referred to as a 'change of mind' return.
  • Not all products are eligible for change of mind returns (click here for excluded products). Final Clearance products are not eligible for change of mind returns.
  • Once you submit a Return Request, we will provide return instructions via email (along with a prepaid return label if applicable). Please wait to receive this before returning any items (Try 2 Anything excluded)
  • Change of mind returns can be resolved by your choice of exchange, full store credit, or a refund. Refunds are subject to a $19.95 admin fee.

For a full overview of our returns and warranty policies, see Returns and Warranties

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