Q36.5 Jackets

Fabric Tech and the 36.5°C Promise

The foundation of every Q36.5 jacket is UF (Unique Fabric) technology - proprietary textiles developed specifically for cycling rather than adapted from other sports. The key to how they work is body mapping: different fabric constructions placed precisely where your body generates heat, loses it, or needs airflow. The result is a microclimate that stays stable across changing conditions rather than swinging between clammy and freezing.

At the core of the waterproof and rain-resistant models is a hydrophilic membrane - a breathable layer that actively draws moisture vapour through the fabric from skin to outside air. This is what separates Q36.5 from jackets that simply block the weather. A windproof membrane that doesn't breathe traps sweat; on a long Welsh climb in February, that boil-in-the-bag effect is every bit as miserable as getting soaked. Q36.5's approach keeps vapour moving outward while blocking inward water ingress.

DWR treatment on the outer face stops water from saturating the fabric and degrading that breathability. When the coating is working properly, rain beads and rolls off rather than wetting out the shell. Hermetic collars seal the neck against wind and spray, while raw cut cuffs avoid bulky seam points that would otherwise bunch under gloves. Every detail is load-bearing.

Compared to equivalents from Assos or Castelli, Q36.5 sits at the more obsessive end of the material-science spectrum. These aren't jackets built around a look - they're built around a physiological target.

The Range and How It Fits

Q36.5 runs a tight, purposeful jacket range. Understanding where each model sits saves you buying the wrong tool for the job.

The Termica is the deep-winter option - built for temperatures in the low single digits and below, with heavier thermal construction and maximum insulation. If your winter training involves dark January mornings and sub-five-degree starts, this is the one. The R.Shell steps in when rain is the primary enemy: its hydrophilic membrane and taped construction make it the most waterproof of the range, suited to the kind of sustained Scottish or Pennine downpours that test lesser jackets within the first kilometre. The Interval is built for pace - lighter, highly breathable, optimised for high-tempo efforts in milder or changeable conditions where overheating is as much a risk as getting cold.

Fit across the range follows an ergonomic race cut. Standing up straight in a Q36.5 jacket, it'll feel snug - possibly very snug. On the bike, in the drops or on the hoods, it'll sit exactly right: no bunching at the front, no riding up at the back, no fabric flapping at speed. If you're between sizes or planning to run a heavier Q36.5 base layer underneath in serious cold, size up. The fit rewards that decision.

Looking for core protection without the sleeves? Explore our dedicated range of Q36.5 Gilets.

Building a Layering System for UK Conditions

A Q36.5 jacket performs best as part of a considered system rather than a standalone fix. The fabric's moisture management depends on vapour having somewhere to go - which means the layer against your skin needs to be moving sweat away actively, not holding it. Pair any Q36.5 jacket with a merino or synthetic technical base layer and the hydrophilic membrane can do its job properly. Pull on a cotton layer underneath and you've neutralised most of what you paid for.

For winter riding, a mid-weight base layer under the Termica handles most days down to around freezing. Add Q36.5 gloves and bib tights and you've got a coherent system where the materials are working together rather than against each other. That matters on a four-hour winter ride in the Peak District far more than it does on a quick blast.

Care is straightforward but non-negotiable. Wash at 30°C using a technical apparel detergent - products like Nikwax Tech Wash are formulated not to strip functional coatings. Avoid fabric softener completely; it clogs the membrane and kills breathability fast. After washing, a low-heat tumble dry or a gentle re-proofing spray restores the DWR treatment and keeps the outer face shedding water properly. Skip this step a few times and you'll notice the difference on a wet ride sooner than you'd expect.

The Q36.5 winter cycling jacket range is an investment, and the care routine is what protects that investment over seasons rather than months. It's genuinely worth doing.

Frequently Asked Questions

Are Q36.5 cycling jackets true to size?

The fit is a strict ergonomic race cut - flush to the body in the riding position, which can feel tight when you're standing around. If you want a slightly more relaxed feel, or you're planning to layer heavily underneath in deep winter, go up a size. Q36.5 rain jacket sizing runs consistent across the range, so once you know your size in one model, it translates reliably to others.

How waterproof are Q36.5 winter jackets?

Models like the R.Shell use proprietary hydrophilic membranes combined with advanced DWR coatings to handle heavy, sustained rain - the sort of weather that's routine on UK rides rather than exceptional. They're engineered to stay dry from the outside while staying breathable enough to prevent sweat buildup inside. Seam construction and hermetic collar details add to the overall protection. Keep the DWR coating maintained with proper washing and occasional re-proofing and performance holds up over time.

What is the difference between the Q36.5 Termica and Interval jackets?

The Termica is built for serious cold - sub-zero to low single-digit temperatures - with heavier thermal insulation and a focus on blocking heat loss. The Interval is a lighter, more breathable jacket optimised for higher-intensity riding in milder or variable conditions, where overheating is a real concern. A Q36.5 Termica jacket review will tell you it's a dedicated winter tool; the Interval is more of a shoulder-season and high-output workhorse. They cover different ends of the range rather than competing with each other.