Is this jacket warm enough for fall?

It is a single-layer cotton knit with no lining or fill, so it works as a mild-weather layer over a shirt. For cold days you would need something heavier underneath or a different jacket.

How does the Tall fit differ?

Tall sizes add length in the body and sleeves while keeping the same chest measurements as Regular. If you are tall and normally size up for sleeve length, the Tall fit is the better match.

Does the hidden zipper mean no visible buttons?

The front closes with a zipper plus snaps behind a placket, so the hardware is mostly concealed. The knit point collar stays visible and gives it a polo-like look.

Can it be worn with a dress shirt and tie?

Yes. The mercerized cotton has a slight sheen and the collar is structured, so it layers cleanly over a shirt. It is more casual than a blazer, though.

Will the cotton shrink in the wash?

Mercerization reduces shrinkage compared with untreated cotton, but the fabric is still 100% cotton. Cold wash and low heat drying keep the fit closer to original.