Grit 28 vs Fast Kumo 36: Which Fastpack to Choose
By Gossamer Gear | take less. do more. | Published: 2026-10-25
Category: Comparisons
Compare the streamlined Grit 28 Fastpack and the versatile Fast Kumo 36 Fastpack to find the ideal ultralight pack for your day hikes and fastpacking adventures.
Quick answer
Choose the Grit 28 Fastpack if you prioritize minimal weight and a stripped-down design for fast day trips. Pick the Fast Kumo 36 Fastpack when you need a bit more volume and a vest-like fit for longer or gear-heavy outings.
Capacity trade-off: 28L vs 36L
The Grit 28 offers a compact 28-liter volume that forces you to pack only the essentials—perfect for day hikes where every ounce matters. The Fast Kumo 36 gives you 36 liters, which provides room for extra layers, a larger food supply, or a minimal overnight kit.
If you often carry a camera, extra water, or a puffy jacket, the extra 8 liters of the Fast Kumo 36 will be noticeable. If you prefer to go as light as possible and rarely need more than a shell and snacks, the Grit 28 is the smarter choice.
Fit and features: vest-style vs streamlined
The Fast Kumo 36 is redesigned with a vest-like fit and easy-access storage, making it ideal for trail running or fast hiking where you need quick access to water, snacks, or a phone. The Grit 28 has a vest-style harness but keeps the design more streamlined, shaving base weight ounces with refined buckles and lighter materials.
Both packs use a vest-style harness, but the Fast Kumo’s extra pockets and structure add a small weight penalty. The Grit 28’s simplicity saves those ounces and reduces bulk, which can be a deciding factor if you are chasing a personal record.
Trade-offs at a glance
- Volume: Grit 28 holds 28L – forces minimalism; Fast Kumo 36 holds 36L – accommodates extra gear.
- Weight & simplicity: Grit 28 is lighter and more streamlined; Fast Kumo 36 has more pockets and structure but weighs slightly more.
- Access & speed: Fast Kumo 36 offers vest-like easy-access storage; Grit 28 keeps it simple with fewer but refined pockets.
Product facts at a glance
- Fast Kumo 36 Fastpack: The Fast Kumo 36 has been re-designed with a vest-like fit and easy access storage to keep up with you at your fastest speeds. You get quick-access pockets and a secure fit that lets you grab snacks, filter water, or stash a layer without stopping.
Fast Kumo 36 Fastpack - Grit 28 Fastpack: The Grit 28L Fastpack’s streamlined design, refined buckles, and vest-style harness shave base weight ounces without compromising comfort. Every gram counts on a fast day hike, and the Grit 28’s minimalist approach helps you maintain speed without sacrificing carry comfort.
Grit 28 Fastpack
Which fastpack fits you?
Best for
- Ultralight day hikers who want the lightest possible pack for short, fast outings
- Trail runners or fastpackers who need extra volume for longer days or minimal overnight gear
Not for
- Hikers who need a full suspension frame or load lifters for heavy loads—consider a traditional backpack instead
