Ortlieb Rucksacks

How Ortlieb's Waterproofing Actually Works

Most waterproof bags rely on DWR-coated fabrics and taped seams - a reasonable approach until the coating wears and the tape lifts. Ortlieb takes a different route entirely. Their bags are built from PD620 or PS620C proprietary PU-coated nylon, then joined using high-frequency 3D welding rather than stitching. The result is a seam with no perforations, no thread to absorb moisture, and no weak points for road grit to exploit over time. It's a fundamentally more durable construction, and you notice it after two or three hard winters when the bag still looks and functions as it should.

The Classic line uses PD620 PU-coated polyester - tough, wipe-clean, and proven across decades of courier use. Step up to the Plus or Free lines and you get PS36C Cordura blends or PVC-free PU alternatives that reduce environmental impact without sacrificing weather performance. Both achieve IP64 as a baseline, meaning protection against dust and heavy water spray from any direction. Select models push further with IP67-rated submersion resistance, relevant if you're riding flooded trails or genuinely foul coastal paths in winter.

On models where a zipper is unavoidable - Ortlieb's organiser pockets being the obvious example - the brand specifies TIZIP waterproof zippers, a meaningful upgrade over standard aqua-stop designs. Worth knowing: TIZIP closures need occasional lubrication with the supplied silicone grease to stay supple and watertight. Neglect that and they'll stiffen up, which puts stress on the zip tape. Takes two minutes and saves a lot of grief. If you're after a single-strap option rather than a two-shoulder pack, the Ortlieb Messenger Bags range covers that ground, and for water carriage on longer rides, Ortlieb Pannier Bags might better suit your setup.

Velocity, Commuter Daypack, Atrack: Which One Are You?

Ortlieb rucksacks split broadly into three camps, and picking the wrong one is easily done if you go by volume alone. The Velocity is the purist's choice - a roll-top courier bag with a simple foam back pad, a single main compartment, and almost no organisational pocketing. That's not a criticism; it's the point. Less structure means fewer failure points, faster loading, and a bag that's happy being slung into a van, strapped to a rack, or stuffed under a train seat. The roll-top closure is genuinely excellent: roll it three times, clip the buckle, and you've got a fully sealed bag in under five seconds. No fiddling with zips in the rain.

The Commuter Daypack is aimed squarely at riders who need their bag to function at a desk as well as on a bike. It adds a TPU back padding system with ventilation channels - meaningfully cooler against your back on a hard push than the Velocity's foam slab - plus a padded laptop sleeve and external zip pockets for quick-access items like an Oyster card or phone. Those external pockets aren't waterproof, which is a fair trade-off Ortlieb are honest about: the main compartment stays sealed, and the pockets are protected enough for most riding conditions short of sustained downpour. If that compromise bothers you, keep the essentials in the main roll-top section.

For off-road and bikepacking use, the Atrack series changes the geometry entirely. It's cut to sit closer to your back, uses ergonomic shoulder straps with load-lifter adjustment, and is designed for the kind of all-day carrying that trail riding or loaded touring demands. Volume runs from 25 to 45 litres depending on the variant. If you're comparing options across brands, Deuter rucksacks offer strong competition in the bikepacking-adjacent space, while EVOC rucksacks are worth a look if you want integrated back protection for trail riding. For longer multi-day trips where you're mixing bike and off-bike luggage, pair an Ortlieb rucksack with a set from the Ortlieb Holdalls range to keep everything under the same weatherproofing standard.

Keeping Your Ortlieb in Shape Through a UK Winter

Road salt is the quiet destroyer of cycling kit. It works into zip teeth, degrades adhesives, and leaves a white residue on PU coatings that, if left, can cause surface cracking over time. The good news is that Ortlieb's welded construction is far more resistant to this than stitched bags - there's no thread to wick salt into the seams. But a wipe-down after a particularly grim commute is still worth doing, especially around the roll-top buckles and any external hardware.

Cleaning is straightforward: warm water, mild soap, soft sponge. That's it. Don't machine wash, don't use anything solvent-based, and don't leave the bag to soak. Harsh chemicals strip the PU coating from the inside out, and once that goes, the bag's waterproofing is compromised at a structural level. A quick rinse after a salty ride takes less time than a puncture repair and will add years to the bag's life. For models with TIZIP zippers, run a thin bead of silicone grease along the teeth every couple of months - more frequently through winter. You'll feel the difference immediately; a well-lubricated TIZIP glides, a dry one drags.

If you're commuting in low-light conditions - and in the UK from October through February, you almost certainly are - check whether your chosen model has reflective yarn woven into the fabric or mounting points for a rear light. Several Ortlieb bags include both. It's not a detail to overlook when you're sharing a road with rush-hour traffic. Riders who want maximum coverage at this point might also consider adding Ortlieb Mudguards to keep road spray off the bag as well as themselves. Alternatives like Chrome rucksacks and Altura rucksacks are worth comparing if you want different organisational layouts or price points, though neither matches Ortlieb's welded construction for long-term waterproof integrity.