The Rab Protium 35 Pack reflects Rab’s evolution into technical carry systems that complement its high-performance apparel range. Drawing from its climbing and mountaineering heritage, the Protium 35 aims to deliver a stable, breathable pack that accommodates fast hikes, scrambles, and lightweight overnight setups without excess bulk or complexity.
Across a full season of testing—from Lake District ridge traverses to fastpack loops in the Pyrenees—the pack demonstrated that less really can be more when engineered with purpose.
Build Quality and Materials
Constructed from 210D Robic recycled nylon, the Protium 35 balances weight savings with abrasion resistance. Reinforced panels protect high-wear zones, and the pack includes:
- Roll-top closure with side buckle cinch
- Hydration bladder sleeve (up to 3L)
- Front stash pocket for wet layers or quick-access gear
- Dual side stretch mesh pockets
- Two zippered hipbelt pockets
- Ice axe/trekking pole carry loops with bungee lock-offs
The use of recycled fabrics supports Rab’s sustainability push, with bluesign-approved materials throughout. Stitching and seam alignment are tight and clean, even under load.
Harness System and Fit
The Tri-Flex carry system is the pack’s secret weapon. Unlike trampoline-style suspensions or stiff frames, it uses:
- Form-fitting back panel with laser-cut foam
- Contoured shoulder straps with breathable mesh and lightweight padding
- Wide hipbelt wings to distribute weight without excessive padding
- Adjustable sternum strap with integrated emergency whistle
Fit characteristics:
- Torso length: Adjustable between ~47–52cm
- Pack hugs the spine with minimal sway or lift
- Hipbelt stability stays solid even during rock-hopping or downclimbs
This is a pack that feels planted rather than perched, providing confidence across exposed terrain.
Storage and Layout
The Protium 35 offers clean, minimalist storage with alpine logic baked into the layout.
Breakdown:
- Main compartment (roll-top): Holds 28–35L depending on how much you compress
- Front stretch pocket: Swallows rain jackets, snacks, or crampons
- Hipbelt pockets: Good for GPS, gloves, or quick snacks
- Side pockets: Deep enough for 1L bottles or trail poles
- Internal bladder sleeve with hose routing
What it lacks:
- No top lid or zippered brain
- No dedicated electronics sleeve
- No panel or rear access
- No frame sheet or stay system
For ultralight users, this means simplicity and security. For photographers or tech-heavy users, external lash options may be needed.
Trail Performance and Real-World Use
On the trail, the Protium 35 strikes a balance between mobility, comfort, and load control.
Test results:
- Loaded with 8–12kg, the pack stayed secure during fast hikes and class 2–3 scrambles
- Shoulder and hip padding remained comfortable after 5–6 hour days
- Ventilation was adequate for UK conditions—some back sweat buildup in summer, but better than foam-core designs
- Roll-top kept contents dry in moderate rain without a cover
Even when overloaded with stove, tarp, and camera gear, the pack didn’t deform or sway. It’s ideal for:
- Alpine day missions
- Fastpacking with a bivvy/tarp
- Gravel bike overnighters (fits in basket or rack when rolled tight)
Durability and Long-Term Impressions
After 3 months of continuous use:
- No stitching failures or fabric abrasion
- Buckles remained tight and responsive
- Side pockets retained stretch and elasticity
- Roll-top held seal integrity without water ingress
The only minor gripe is the lack of reflective elements or color visibility options, which matters for dawn starts or urban interfaces. Otherwise, the Protium 35 feels like it will easily outlast cheaper competitors.
Weight and Dimensions
- Weight: 925g (unloaded)
- Volume: 28–35L (expandable roll-top)
- Dimensions: Approx. 56 x 30 x 24 cm
It sits in the same weight class as serious fastpacking packs, but offers more durability and structure for mixed terrain.
Comparison Chart: Protium 35 vs Key Mountain Daypacks
| Feature | Rab Protium 35 | Osprey Talon Pro 36 | Montane Trailblazer 30 | Deuter Speed Lite 32 |
|---|---|---|---|---|
| Weight | ~925g | ~1120g | ~900g | ~870g |
| Closure Type | Roll-top | Zipper lid + drawcord | Zipper panel | Zipper top |
| Back System | Tri-Flex foam panel | AirScape ventilated mesh | ZephyrAD harness | LiteFlex back |
| Volume Range | 28–35L | Fixed 36L | Fixed 30L | Fixed 32L |
| Hydration Sleeve | Yes | Yes | Yes | Yes |
| Hipbelt Pockets | Yes | Yes | Yes | Yes |
| Ice Axe Loops | Yes | Yes | Yes | No |
| Best Use | Fastpacking, alpine day hikes | Technical day hikes | Lightweight hiking | Trail missions, scrambling |
| UK Price Range | £95–£115 | £130–£160 | £90–£110 | £85–£100 |
Final Verdict
The Rab Protium 35 Pack is a stripped-down, go-fast mountain pack that doesn’t skimp on performance or durability. Its clever harness system, roll-top adjustability, and alpine-ready features make it a top contender for serious users who want to keep weight down without sacrificing comfort or control.
It’s not your all-purpose commuter or travel pack—but for fast trails, scrambles, and summit days in mixed conditions, the Protium 35 delivers.
