An outer jacket has to cooperate with the layers under it. The Outdoor Research Women's Skytour LT 3L Jacket is worth comparing from that outside-in perspective: enough usable room over your chosen clothing, with construction matched to the weather you expect.

The 3L designation belongs to the product name. I'd confirm its precise meaning in the current specifications rather than interpret it as a size or storage capacity.

The Starting Details

Women's jacket format.
Skytour LT 3L model designation.
Polyester material information.

Look at the full shell construction, seam treatment, closures, and any ventilation features described by the manufacturer. Those are more useful for choosing technical outerwear than the jacket category alone.

Fit It With the Real Layers

A shell-style outer piece shouldn't be assessed only over a thin shirt if you'll wear insulation underneath. Try the intended combination and check shoulder movement, cuffs, and hem position.

Also consider the equipment that sits on top. A pack or harness can change access to pockets and affect where a jacket bunches. Choose the features you'll actually be able to use during the outing.

My Take

I'd shortlist the Skytour when the documented construction matches a specific outdoor use and the cut works with the rest of my clothing. For simple daily errands, a less technical garment may be perfectly adequate and easier to justify.

Don't assign a whole clothing system's warmth to the outer jacket. The insulation beneath it and the conditions still drive that part of the plan. This product makes the most sense when its exact weather features, fit, and handling are useful to you, rather than as a purchase based only on a technical-sounding model name.