Bottom Line
The Rab Syclon XP 30L stands out for two reasons: it is genuinely weather-focused, and it has one of the most comfortable suspension systems in our daypack lineup. Its IPX4 construction handles rain and snow without requiring a separate rain cover.
The suspended mesh back panel creates excellent airflow and has enough give to stay comfortable over long days. An internal metal frame also gives this sub-two-pound pack impressive load control for its size.
Storage access is more limited than on pocket-heavy competitors, and 30 liters is more capacity than many day hikers need. For wet climates, winter use, or hut-to-hut travel, though, the combination is compelling. For more options, see our best hiking daypacks guide.
How We Tested
CleverHiker Editor and gear analyst Jory Brass tested the Syclon XP in New Mexico on dry desert hikes as well as deliberate wet-weather checks, including a shower test to evaluate its waterproof construction. We also loaded the 30-liter pack with typical all-day gear to assess how the internal frame, suspended mesh back panel, and streamlined storage handled weight, ventilation, and access.
Quick Specs
- Best for: Waterproof and wet-weather hiking
- Material: 40D recycled high-tenacity nylon and 100D ripstop nylon
Rab Syclon XP 30L
Best Waterproof Daypack
CleverHiker Rating: 4.4/5.0
Price: $200
Weight: 1 lb. 12.5 oz.
Capacity: 30 L
Frame: Internal frame
Pros
- IPX4 waterproof rating
- Suspended mesh back panel
- Lightweight
- Compatible with a bladder and flasks
- Carries weight well
Cons
- Less accessible storage
- Only available in higher volumes
Comfort
The Syclon earns the highest comfort score in our current daypack field. Its suspended mesh back panel holds the pack away from the spine, creating a broad air gap and reducing the hot, damp feeling common with close-contact systems.
The tensioned mesh also has enough flex to move naturally with the body rather than feeling like a rigid board. We appreciated that comfort even in dry desert conditions, where waterproof construction was not the reason we chose the pack.
At 30 liters, it has room for substantial gear without feeling excessively bulky on the back, making the suspension useful across a wide range of conditions.
The AEROFIT suspension is comfortable across a surprisingly wide load range. Its soft suspended mesh keeps the pack off the back, while ergonomic shoulder straps and a flexible, padded hipbelt create a secure wrap around the torso. We stayed comfortable with both light and fully loaded setups, and the off-the-back mesh dried quickly in hot conditions.
Fit range is the main caveat. The Syclon does not offer an adjustable torso or gender-specific sizing, and its single torso length is intended for roughly 18- to 21-inch backs. Our tester fit it well, but smaller hikers may not get the same result. The suspension is excellent when it matches your body, but it offers fewer ways to correct a poor fit than more adjustable packs.
Comfort Score: 4.9 / 5.0
Organization
The Syclon is comparatively streamlined. It provides the storage needed for a technical daypack and works with both bladders and flasks, but it does not surround the user with the same number of quick-access pockets as the Talon, Protium, or Zulu.
That simplicity supports weather resistance because fewer openings and seams create fewer potential ingress points. The downside is that hikers who constantly reach for snacks, phones, or layers may need to stop and open the main storage more often.
Organization is therefore a tradeoff rather than a failure: weather protection and clean construction take priority over maximum access.
Waterproof construction drives the storage layout. The roll-top opens into a large, mostly uninterrupted 30-liter compartment, with only a small hanging pocket and key clip for valuables. That simplicity helps protect contents from weather, but hikers who like many dividers will spend more time organizing gear in separate pouches.
External storage improves access somewhat. Small stretch pockets on the shoulder straps and hipbelt hold items such as lip balm, gels, sunglasses, or a soft flask, while a deep front pocket can hold a puffy, shell, or camera. Hydration flexibility is excellent: the dedicated sleeve handles a 3-liter reservoir, side pockets fit wide and narrow bottles, and a shoulder pocket can carry a small soft flask.
Organization Score: 4.1 / 5.0
Support
An internal metal frame gives the Syclon more load support than its low weight suggests. With a full 30-liter load, the pack keeps its shape and carries weight more comfortably than frameless alternatives.
The supportive structure works with the suspended back panel and hipbelt to keep the load stable while still allowing airflow. It does not feel as overbuilt as the heavier Gregory Zulu or Stratos/Sirrus.
For hikers who want enough backbone for water, winter layers, and technical gear without carrying a three-pound pack, this is one of the most efficient support systems we tested.
We deliberately overloaded the Syclon on a 12-mile, 4,000-foot summit day with 3 liters of water, a heavy tripod and DSLR, winter layers, microspikes, a puffy, and a shell. The internal metal frame spread that weight across the back and lowered enough of it into the hipbelt to keep pressure off the neck and shoulders.
That performance is unusual for a sub-2-pound daypack. The hipbelt is not as burly as the one on the Gregory Zulu, but it wraps the hips well enough to take advantage of the frame. The Syclon is a strong choice for hikers who need real support but do not want to carry the weight of a conventional heavy-hauling pack.
Support Score: 4.6 / 5.0
Weight & Packability
At 1 lb. 12.5 oz., the Syclon is remarkably light for a 30-liter pack with a metal frame and waterproof-focused construction. It undercuts many smaller traditional hiking packs while offering more capacity.
The frame prevents true roll-up packability, and the 30-liter volume means the pack still occupies meaningful space in luggage or a larger pack. It is lighter than it is compact.
That distinction matters: this is a weight-efficient technical pack, not a stashable travel daypack. Hikers who value frame support and waterproofing will appreciate the low scale weight; travelers seeking maximum compression should look elsewhere.
At 1 lb. 12.5 oz., the Syclon is more than a pound lighter than the other metal-frame daypacks we tested, despite offering 30 liters of space and waterproof construction. The lighter hipbelt, shoulder straps, and stretch pockets help control weight without stripping away the support system that makes the pack useful under a full load.
The frame and suspended mesh mean the pack does not truly compress. It is not a good suitcase-stuffer or secondary pack, although the roll-top and exterior compression straps let hikers reduce its working volume when it is not full. This is a light technical pack rather than a highly packable one, and that distinction matters for travel-focused buyers.
Weight & Packability Score: 4.0 / 5.0
Should You Buy the Rab Syclon XP 30L?
Buy it if rain, snow, or wet travel is a regular part of your hiking and you want excellent ventilation without giving up load support. It is less appealing if you want many quick-access pockets or only need a small-volume daypack.
What Other Daypacks Should You Consider?
Osprey Stratos 24 / Sirrus 24 Review: The Stratos/Sirrus is the better option if you want more familiar pocket access and maximum traditional daypack support. Its AirSpeed suspension is highly ventilated, and the internal frame and padded hipbelt are excellent under heavier loads. The Syclon is lighter and waterproof, while the Osprey gives you easier organization and a more conventional hiking layout. Pick based on whether weather protection or access matters more.
Rab Protium 27L Review: The Protium is the more versatile all-around Rab option if you value organization over waterproof construction. Its deep side pockets, top storage, hipbelt access, and included rain cover are easier to use for gear-intensive day hiking. The Syclon is lighter, more weatherproof, and exceptionally ventilated. We prefer the Protium for mixed conditions and frequent pocket access, and the Syclon for consistently wet environments.
Gregory Zulu 30 / Jade 28 Review: The Zulu/Jade is the stronger heavy-hauler. Its perimeter frame, thick cushioning, and substantial hipbelt transfer more weight to the hips and are better suited to winter gear or dense loads. It is much heavier and far less packable than the Syclon. If load comfort is the single priority, choose Gregory; if you want 30-liter capacity with lower weight and waterproof construction, the Syclon is the more efficient tool.
