Is this a real tuxedo or a costume jacket?

It is a western-styled tuxedo jacket: notch lapel, satin trim and a linked satin button closure. The polyester build puts it closer to event wear than to a wool formal tux.

Will it keep me cool at an indoor event?

Not especially. Polyester and a full lining hold heat, and the jacket has no back vent, so it runs warm in a crowded room.

How does the linked button closure work?

A single double-sided satin button connects through a buttonhole on each side of the front, so the jacket closes with one button rather than a row.

Do the sleeves fit different arm lengths?

The sleeves are telescopic, so the length can be adjusted at the cuff. That helps when off-the-rack sleeve length is between sizes.

No. Matching pants are sold separately, so the jacket works as a standalone piece or as part of a full western tux.

How should I care for the polyester and satin trim?

Follow the care label; polyester generally tolerates gentle machine washing, but the satin trim and linked button are best protected by careful handling or dry cleaning.