THE NORTH FACE HST Hume 6 Review: Is this really a backpack? The ultimate lightweight running vest's surprising lightness and fit make all the difference

Friday, September 12, 2025

Offers , Backpacks , Gear Reviews , THE NORTH FACE , Recommendations , Trail Running

Written by Yasushi Hisatomi

What we learned from long-term testing on midsummer trails was that the moment we put this vest on, our concept of "lightness" was overturned. The fit is so snug it feels like a part of the garment. What have running vests been like up until now? This is such innovation that it makes you wonder.

The North Face's "HIGH SPEED TRAIL KIT" collection is a no-compromise pursuit of gear that maximizes both lightness and functionality in order to help runners maximize their performance in the increasingly fast short- to mid-range races that are the trend in trail running these days. Using the gear was an experience that allowed me to fully appreciate this strong commitment. The "HST Hume 6," which I will be reviewing today, is at the heart of this collection.

table of contents

The essence of THE NORTH FACE's HST Hume 6 at a glance
Main Specifications and ratings
Detailed review: How was it when you actually used it?
Summary: A next-generation running vest that overturns the concept of choosing a running backpack
- Purchase recommendation: ★★★★★ "If you're a target user, buy it without hesitation!"
Details and purchase of THE NORTH FACE "HST Hume 6"

The essence of THE NORTH FACE's HST Hume 6 at a glance

"Lightweight, cool, easy to use, and stable" - these four things tell the whole story

The Hume 6 is a next-generation running vest developed with four key themes in mind: lightweight, breathable, spacious, and easy to move around in. The back features THE NORTH FACE's proprietary Monomesh technology, which minimizes water retention and breathability, minimizing weight gain even during extended use. The vest is packed with practical features designed for racing, including three magnetic chest straps for a secure fit and a variety of pockets that are accessible while running.

Favorite points

Extremely light (approximately 155g for size M)
Incredible breathability - Monomesh keeps your back dry
Magnetic buckle - the pleasure of snapping into place just by bringing it close
Pockets strategically placed for easy access while running
Front-mounted pole system for unrestricted arm movement
Stretch fabric that packs more than it looks

What's bothering me

6L capacity - not enough for long runs
Zipperless pockets: managing your valuables requires ingenuity
No storage for water bladders is a problem for those who use hydration devices

Main Specifications and ratings

item	THE NORTH FACE "HST Hume 6"
Actual measured weight	S/approx. 140-150g, M/approx. 155-165g, L/approx. 175g
capacity	6L (S, M size), 7L (L size)
material	Stretch fabric, monomesh (back)
color	Tingley
Female model	Unisex design
Chest strap	3 (magnetic)
Main Access	Panel loader type
Pole holder	Front diagonal mounting type
Outdoor Gearzine Rating
Comfort	★★★★☆
Stability	★★★★★
weight	★★★★★
Storageability	★★★★☆
Functionality	★★★★★
Durability	★★★★☆
Versatility	★★☆☆☆

Detailed review: How was it when you actually used it?

Material: "Is this really fabric?" The secret behind uncompromising lightweight design

Thin yet strong, light yet functional—experience a revolution in materials

What sets the Hume 6 apart from other running vests is the material it is made of.

What particularly surprised me was the stretch fabric used for the main body. At first glance, it seems surprisingly thin, but what's particularly noteworthy is its moderate elasticity and strength. Thanks to the flexibility of this material, I was able to efficiently store much more luggage than its apparent capacity, and I felt like the pack was moving in unison with my body while maintaining its overall silhouette.

Monomesh material throughout the back

The true star of this pack is the monomesh that covers the entire back and shoulder harness. Conventional vests face the dilemma of sacrificing breathability when they require stability and cushioning, resulting in a heavy, sweat-absorbing fabric and an unpleasant sticky feeling.

However, the Monomesh adopted by THE NORTH FACE solves this problem from the ground up. By minimizing water absorption while ensuring high breathability, the back is always kept dry, which I felt was the ideal state for a runner. This is nothing less than the embodiment of a simple and rational design concept: gear does not need to have excess water absorption capabilities, and by working in conjunction with quick-drying clothing, you can achieve optimal performance.

Monomesh material is gentler on the skin than it looks, so you don't have to worry about chafing.

Comfort: "It's like wearing clothing!" Feels like it's one with your body

It's so stable you wouldn't believe it weighs just 155g - is this a revolution in fit?!

Packs that have been stripped down to the bare minimum tend to sacrifice stability, but the Hume 6 offers a comfortable fit and stability that is hard to imagine given its lightness, almost like clothing.

The secret lies in the shoulder harness, which is designed to follow the lines of the body.

The thin, wide harness fits gently to the body without feeling any pressure, distributing the weight of the pack evenly across the back without concentrating it in one spot. What further enhances this sense of unity are the three magnetic chest straps. They stay in place even during intense riding movements, and yet their intuitive operation allows for quick one-handed fastening and fine adjustment, so you can stay focused. Once you try them, you'll never go back to regular buckles.

The chest strap is magnetic and easy to attach and detach. This is a lifesaver in the winter when your hands get cold.

On flat trails, I barely felt the pack's presence. Especially on steep climbs and descents, the magnetic chest strap held the pack snugly to my body, completely preventing the pack from moving around. The sense of stability was something I'd never experienced with a running vest before.

The area around the shoulder blades is widened and does not interfere with the range of motion of the arms.

However, I feel that this pack is extremely stoic, designed to maximize the physique and performance of top runners. Fine adjustments are only possible with the chest strap, so if it doesn't fit your body properly, you won't be able to get a good fit. Trying it on before you buy is essential to ensure the best fit and stability. This uncompromising design, which doesn't assume loose wear, is the true essence of the Hume 6.

This level of comfort is so great that you'll forget the pack is there even during long runs, and is the culmination of a design philosophy that pursues performance.

The sides and back side pockets are made of a stretchy jersey-like material that is a blend of 80% nylon and 20% polyurethane.

Storage: "It's only 6L, but it can hold this much?" A meticulous space-saving approach

Layout over capacity: The secret to storage that can be used while riding

I felt that the 6L capacity was ideal for activities with minimal equipment, but I realized that the true value of this pack lies not just in its capacity, but in the efficient pocket placement, which has been carefully calculated.

This size was enough to store the essential items for a mid-range trail running race. Specifically, I had room to spare even after putting in two flasks, five gel packs, a lightweight rain jacket and pants, a headlamp, a first aid kit, etc. The stretch fabric flexibly accommodates any increase or decrease in luggage, allowing me to make the most of the capacity.

However, be careful with your hydration plan as the backpack does not have space to store a hydration bladder and is designed to be hydrated using a flask or similar in the front pocket.

One particularly notable feature is the external storage that can be accessed while running. The shoulder harness has a bottle pocket that can hold flasks and water bottles, as well as a two-tiered pocket that can store gels and small items separately. This means you can instantly reach the items you need without having to take the pack off. However, there is one thing to be aware of: many of the pockets do not have zippers, so you need to be careful when storing smartphones or valuables as they may fall out.

Flask is secured with an elastic strap

My smartphone fits in there, but it keeps shaking around which is annoying.

Gels fit securely and do not fall off easily

Furthermore, the stretch pocket at the bottom of the back is excellent, allowing you to access gear you need to quickly access, such as a wind shell or headlamp, with your back hand, reflecting the design philosophy of thoroughly eliminating even the slightest loss of time during a race.

There is ample storage space on both sides to store rainwear and headlights.

Pole attachment: "Extremely free arm swing!" Revolutionary attachment system

From back to front - a revolutionary diagonal mounting

Previously, poles were typically attached to the back, but the Hume 6 is attached diagonally to the front. At first I thought, "Huh?", but after using it, it made sense. It doesn't interfere with arm swing at all, and I was surprised at how smoothly it could be attached and removed while running.

When wearing the backpack diagonally from the front, you need to remove the poles every time you take the backpack off.

Put it on when you're climbing, take it off when you're on flat ground, and put it back on when you're descending. This whole process is stress-free. This is a design concept that prioritizes speed.

It can also be attached to the back, so you can use it however you like.

Durability: "Lightweight yet surprisingly tough!" The surprising strength of a minimalist design

Don't be fooled by appearances—it's sturdy enough

When it comes to lightweight gear, durability is often a concern. However, the Hume 6 has overcome that concern in a good way.

I used this pack for a month and washed it multiple times, but it showed almost no deformation or noticeable deterioration. I was truly surprised by its toughness. Despite their light appearance, both the stretch fabric of the main body and the mono-mesh on the back are incredibly tough. This proves the validity of the minimalist design philosophy, which strips away unnecessary decoration and carefully selects only the essential materials.

However, it's important to understand that this toughness is specifically designed for trail running, and not for more demanding mountain activities such as climbing rugged rocky terrain, so it was developed to help you finish races faster.

Summary: A next-generation running vest that overturns the concept of choosing a running backpack

For me, the HST Hume 6 is more than just a piece of gear; it's a revolutionary product that has revolutionized the way I choose a backpack for trail running. Its incredible lightness, outstanding breathability thanks to the mono-mesh, intuitive operation of the magnetic chest strap, and meticulous pocket placement—its level of perfection is unmatched.

This vest will undoubtedly set a new standard for speed-focused runners looking for the ultimate vest that combines lightness and functionality. At 23,100 yen, it's not cheap, but considering its innovative functionality and durable build, I believe it's well worth the investment. It's perfect for short- to mid-range trail races, ultramarathons, and other activities where lightness and ease of movement are key.

Purchase recommendation: ★★★★★ "If you're a target user, buy it without hesitation!"

For trail runners pursuing speed in the short to mid-range, this is not just equipment, but the ultimate tool for improving performance. Its value far exceeds the price, and you will not regret buying it.

Details and purchase of THE NORTH FACE "HST Hume 6"

For more information on THE NORTH FACE's "HST Hume 6" product, please visit the official website

Written by: Tojo Kazuya

Born in Mito City, Ibaraki Prefecture. He began working as a member of the company and started a triathlon, and while struggling with running he was not good at, he became addicted to mountain endurance races and completed the first Japan Mountain Endurance Race (commonly known as Hasetsune). From there, we head into the world of mountain sports. After moving to Kawagoe City, Saitama Prefecture in his 30s, he has become addicted to the new swamp of Ultra Marathons, where he has completed a series of harsh long races such as the Shinetsu Five Mountains, Joshu Takeru, and the KOUMI100, and has been running around trail races all over the country.

Based on the belief that "having fun in nature" and "protecting that beautiful nature" are inseparable, he joined Outdoor Gearzine with the desire to share his experiences in the field and truly reliable gear information with everyone. He currently serves as the representative of the NPO "Sainokuni Ultra Project" (https://npo-sup.org/), and is busy promoting the outdoor world outside of running by producing races and hosting local events.