Gear Review: Hyperlite Mountain Gear Aero 28

The Hyperlite Mountain Gear Aero 28 is a lightweight, vest-style backpack designed for hikers who prioritize speed, efficiency, and minimal weight on the trail. Combining Hyperlite's signature Dyneema construction with the fit and accessibility of a running vest, the Aero 28 offers an interesting alternative to traditional ultralight backpacks.

With 28 liters of internal capacity, additional external storage, and a weight of just over a pound, the Aero 28 is built for fastpacking, ambitious day hikes, and minimalist overnight adventures. Its streamlined construction and close-fitting harness are appealing, although a few design limitations prevent it from being the perfect fastpack.

First Impressions

The first thing that stands out about the Hyperlite Aero 28 is how little backpack there actually is. The frameless construction, thin foam back panel, and minimalist hardware keep weight exceptionally low, while the wide running vest harness gives it a distinctly different appearance from Hyperlite's more traditional backpacking packs.

Despite its minimalist construction, the Aero 28 doesn't feel particularly stripped down in terms of storage. The combination of a roll-top main compartment, large exterior pockets, and accessible vest storage offers plenty of organization for hikers who prefer keeping essentials close at hand.

It's immediately apparent that this isn't intended to be an all-purpose backpack. The Aero 28 is designed around a specific style of hiking, and its strengths become much more apparent when viewed through that lens.

Key Features & Specifications

• Weight: Approximately 17.8 oz (506 g), medium
• Capacity: 28 liters internal, 8.5 liters external
• Materials: Dyneema Composite Hybrid and Dyneema stretch mesh
• Harness: Running vest-style shoulder straps with three adjustable sternum straps

• Frame: Frameless with a thin foam back panel
• Hip Belt: Removable webbing hip belt
• Maximum Load: 25 pounds
• Closure: Roll-top
• Available Sizes: Small, Medium, Large
• MSRP: $350

Performance on the Trail

The Aero 28's greatest strength is its stable carrying design. Unlike conventional backpacks that rely on shoulder straps and a hip belt to manage weight, the Aero 28 uses a running vest harness to keep the load close to the body. This minimizes unnecessary movement and makes it particularly well suited to fast hiking, scrambling, and running with a lightweight kit.

The frameless construction also allows the backpack to move more naturally with the body, although that flexibility comes at the expense of load support. While Hyperlite rates the Aero 28 for up to 25 pounds, its design is better suited to significantly lighter loads. Carrying additional water or heavier backpacking equipment can quickly diminish the comfort advantages of the vest harness.

For fastpacking and long-distance hiking, the Aero 28's low weight and stable fit are its strongest assets. It's a backpack designed to complement a lightweight gear system rather than accommodate unnecessary extras.

Comfort & Fit

Comfort is largely dependent on getting the right fit. The Aero 28's wide vest-style shoulder straps distribute weight across the upper torso, while three adjustable sternum straps allow the harness to be secured against the chest. When properly fitted, this arrangement reduces bouncing and shifting without requiring a substantial hip belt.

The fit is more particular than that of a traditional backpack, especially for hikers with narrower shoulders or smaller chests. Because the harness wraps around the upper body, chest measurements and overall body shape play an important role in sizing.

The thin foam back panel provides minimal structure and padding, but ventilation is limited. During hot-weather hiking, the close-fitting design can trap heat against the back. This is a fairly common compromise with running vest-style backpacks, but it's worth considering for desert hiking.

The Aero 28 prioritizes stability and freedom of movement over traditional load-bearing comfort, making it most appealing to hikers who already have their gear weight dialed in.

Storage & Functionality

The Aero 28 offers an impressive amount of storage for its weight. The 28-liter main compartment provides enough space for a compact overnight setup, while the roll-top closure makes it easy to compress the pack as supplies are consumed. The additional external storage is particularly useful for keeping frequently accessed gear separate from the main compartment.

Large side pockets accommodate water bottles and other essentials, while the front stretch pocket offers convenient storage for extra layers. A bottom stash pocket adds another accessible location for lightweight items, and the running vest harness incorporates additional pockets for snacks, hydration, and smaller accessories.

The overall organization is excellent, but the vest pockets could benefit from more generous dimensions and greater stretch.

Durability & Weather Resistance

Hyperlite's Dyneema construction is one of the Aero 28's most appealing qualities. The main pack fabric offers excellent strength relative to weight, along with substantial abrasion resistance and weather protection. It's a material well suited to demanding trail conditions, particularly where minimizing weight is a priority.

The roll-top closure provides additional protection against moisture, although the Aero 28 shouldn't be considered completely waterproof. Not all seams are sealed, so a pack liner or dry bags remain a smart addition when carrying moisture-sensitive equipment.

The external mesh pockets are reasonably durable for their weight, but they're more vulnerable to sharp branches and abrasive surfaces than the main pack fabric. This is a common compromise with ultralight equipment rather than a flaw unique to the Aero 28.

Overall, the Aero 28 offers a strong balance of durability and weight savings, with materials that help justify its premium positioning.

Pros & Cons

Pros

• Exceptionally lightweight construction
• Stable running vest-style harness
• Durable Dyneema materials
• Generous external storage
• Excellent for fastpacking and lightweight overnight trips
• Minimalist, streamlined design

Cons

• Expensive at $350
• Restrictive vest pockets
• Limited comfort with heavier loads
• Minimal back ventilation
• Fit may be challenging for some body types
• Less versatile than a traditional backpack

Packing It Out

The Hyperlite Mountain Gear Aero 28 is an impressive ultralight fastpack that combines durable materials, excellent stability, and thoughtful storage in a remarkably lightweight package. Its running vest-style harness is particularly appealing for hikers who prefer moving quickly, and the Dyneema construction provides the durability expected from a premium Hyperlite backpack.

That said, the Aero 28 isn't without its shortcomings. The restrictive vest pockets are disappointing, especially on a backpack designed around accessibility, and the frameless construction limits comfort with heavier loads. At $350, it's also a substantial investment for a pack with such a specialized purpose.

For dedicated fastpackers and ultralight hikers, the Aero 28 offers a compelling combination of weight savings, stability, and functionality. It isn't the most versatile backpack available, but for those who prioritize speed and efficiency, it's a strong contender.

Bottom Line: The Hyperlite Aero 28 is a capable, premium fastpack that excels with lightweight loads and fast-moving adventures. Its excellent stability and low weight are standout features, although the pocket design and limited load support leave room for improvement.

This article is independent of the supplier and reflects my own opinions and experience. Some links on this page are affiliate links, which means I may receive a small commission if you make a purchase through those links at no additional cost to you.