Mountainsmith Zerk 40 UL Backpack

The Mountainsmith Zerk 40 UL Backpack is the original cornerstone of the Zerk UL Series, co-designed with The Real Hiking Viking for ultralight backpacking. With a 40-liter capacity and weighing just over 2 pounds, it's built for hikers who want to go faster and longer. At the current sale price of $96.18 (compare at $327), this is an unbeatable deal for a premium ultralight pack. Get it online now and save big on your next adventure.

Specifications and Fit

Brand: Mountainsmith
Model: Zerk 40 UL
Product Type: Ultralight Backpack
Capacity: 40 liters
Torso Length Range: 16-20 inches (adjustable)
Weight: 2 lb 2 oz (approx)

Materials and Construction

Made from lightweight yet durable ripstop nylon with a robust frame that carries loads comfortably.

Functions and Use Cases

This pack is ideal for thru-hiking, fast packing, and ultralight backpacking. The Zerk access system (large U-zip on the front) allows quick access to your gear. It also accommodates a bear canister (e.g., BV450) in the main compartment.

Compatibility and Comparisons

The Zerk 40 is compatible with optional accessories like the Zerk Loki and TopLid. Compared to similar ultralight packs, it offers a lower price without compromising on features.

Price Value and Deal

With a compare-at price of $327, you save over $230 (70% off). Plus, use coupon code SLUNG15 for an additional 15% off. Free shipping on orders over $45, or $8 flat shipping.