Is this pullover good for running and workouts?

It works as a light layering piece for mild-weather runs and gym sessions. The knit is not windproof or water-resistant, so it is not a substitute for a technical running top in cold or wet conditions.

How does the Tall fit differ from Regular?

The Tall version adds length in the body and sleeves for taller frames. Shoppers of average height should stay with Regular to avoid a long, loose fit.

Does it have a full zipper or a quarter-zip?

It is a quarter-zip, so the zipper stops at the chest and the mock neck stays closed above it. You can open it partway for ventilation.

It is a synthetic performance knit, typically a polyester blend. It is machine washable; check the care label for exact fiber content and drying instructions.

Can I wear it as a casual sweater?

Yes. The plain design and solid colors work with jeans or chinos. It reads more sporty than a knit sweater, so it suits casual settings better than dressy ones.