Two thermal gilets built around different ride priorities
The Alexia and Sibille both sit in the thermal gilet category, but the supplied product records describe two distinct designs. The Alexia is built around synthetic Primaloft ThermoPlume insulation, stretch side panels for a close cycling fit, and a large zipped rear pocket that doubles as a storage bag. The Sibille is a softshell racing and training gilet with a 10,000mm waterproof shell, air-channel construction and a two-way zip. Neither is simply a warmer version of the other; the choice comes down to whether you prioritize packable insulation or weather protection with on-the-move access.
Alexia vs Sibille at a glance
- Core construction: Alexia: Primaloft ThermoPlume synthetic insulation with a water-repellent recycled-fabric outer shell. Sibille: adaptable softshell with a 10,000mm waterproof rating and air-channel breathability.
- Pocket design: Alexia: one large zipped rear pocket that also serves as a packable storage bag. Sibille: a two-way zip gives access to layers and pockets underneath while riding; the supplied record does not describe a rear pocket on the gilet itself.
- Fit approach: Alexia: stretch side panels for a close body fit and streamlined silhouette. Sibille: described as a technical racing and training gilet; the record does not specify a fit cut beyond that.
- Weather role: Alexia: wind protection and thermal insulation, with a water-repellent shell. Sibille: foul-weather protection with a 10,000mm waterproof shell and breathability for changing tempos.
- Sizes listed: Alexia: S, M, L. Sibille: XXS, XS, S, M, L, XL.
What the Alexia record confirms
- Alexia: Primaloft ThermoPlume synthetic insulation provides wind protection and thermal insulation, and the gilet compacts to fit in a jersey pocket. This is the key reason to choose Alexia when changing conditions mean you may need to remove the gilet mid-ride and store it.
Alexia - Alexia: A large zipped rear pocket also serves as a storage bag. That pocket is the packability system itself, so you get carrying capacity and a stuff sack in one feature rather than a separate bag.
- Alexia: Stretch side panels create a close body fit on the bike and a streamlined silhouette. If you prefer a gilet that stays close without excess fabric, the side-panel construction is the relevant design detail.
- Alexia: A two-way zip completes the design. A two-way zip lets you adjust ventilation from the bottom as well as the top, which matters when effort and temperature change during a ride.
What the Sibille record confirms
- Sibille: The softshell shell carries a 10,000mm waterproof rating, with air-channel construction and membrane technology for breathability. This points to wet-weather protection as a primary role, with breathability intended to cope with changing tempos and temperatures.
Sibille - Sibille: A two-way zip enables further cooling and easy access to layers and pockets underneath while on the move. If you want to reach a jersey pocket without removing the gilet, the two-way zip is the relevant access feature; the record does not describe a rear pocket on the gilet.
- Sibille: Reflective piping and branding plus a zip-guard at the collar complete the package. These are finishing details that matter for low-light visibility and collar comfort, not for insulation or packability.
- Sibille: Available sizes are XXS, XS, S, M, L and XL. The wider size run gives more room to dial in fit, especially at the smaller end of the range.
How pocket design changes the way you ride
The pocket difference is the clearest practical split between these two gilets. Alexia's large zipped rear pocket is also its storage bag, so the gilet has a defined place for small items and a built-in way to compress itself. That suits riders who expect to take the gilet off and carry it. Sibille takes a different approach: its two-way zip gives access to layers and pockets underneath while you are moving. If your jersey already carries what you need and you want to reach it without stopping, that access matters more than an integrated pocket.
Neither approach is universally better. A rear pocket adds capacity but can feel bulky when the gilet is worn. Zip access keeps the gilet itself lean but relies on the pockets you are already wearing. The supplied records do not confirm a rear pocket on the Sibille, so if a gilet pocket is a must-have, treat Alexia as the option with that feature explicitly described.
Fit and sizing: what the catalog does and does not tell you
Alexia's stretch side panels are described as creating a close body fit on the bike, which is a design cue rather than a sizing instruction. Sibille is described as a technical racing and training gilet, but the supplied record does not specify its cut beyond that. The size runs differ: Alexia is listed in S, M and L, while Sibille is listed from XXS to XL. If you fall outside Alexia's listed size range, Sibille offers more options on paper.
What the records do not provide is a size chart, body measurements, or guidance on whether either gilet is designed to be worn over a jersey only or over additional layers. Those details are not confirmed by the supplied information, so use the listed sizes as a starting point and check the store's sizing information before ordering rather than assuming a fit from the description alone.
Layering and conditions: which gilet suits your ride
Alexia is the more insulation-led choice. Primaloft ThermoPlume is a synthetic insulation, and the gilet is described as providing wind protection and thermal insulation while remaining compact enough to stow. That makes it a reasonable pick for cold, dry or lightly damp rides where you expect to regulate temperature by adding or removing a layer. Its water-repellent shell is described as water-repellent, not waterproof, so it is not the choice for sustained rain.
Sibille is the more weather-facing choice. The 10,000mm waterproof shell and breathability construction point to changeable, wet conditions where you want protection without overheating. The two-way zip supports cooling on the move. What the record does not confirm is thermal insulation performance, so treat Sibille as a protective softshell layer rather than an insulated gilet. For winter gilet layering, that distinction matters: Alexia adds warmth, Sibille adds weather protection.
How to decide between Alexia and Sibille
- Choose Alexia if you want packable insulation: The Primaloft ThermoPlume insulation, close fit and pocket-that-becomes-storage-bag design suit riders who expect to remove the gilet and carry it.
- Choose Sibille if wet weather is the main threat: The 10,000mm waterproof shell, breathability construction and two-way zip suit changeable conditions where protection and ventilation matter more than insulation.
- Choose Alexia if a gilet pocket is essential: The large zipped rear pocket is explicitly described on Alexia; the Sibille record does not confirm a rear pocket, only zip access to layers and pockets underneath.
- Choose Sibille if you need a wider size range: Sibille is listed from XXS to XL, while Alexia is listed in S, M and L.
