A blazer is a type of jacket resembling a suit coat cut more casually, typically with metal buttons. A blazer's cloth is usually durable (14oz.), as it is intended as an outdoor jacket. Stylistically, blazers often are uniform garments, e.g. for airline, school, and yachting androwing clubs.

A blazer is generally distinguished from a sportcoat as a more formal garment and tailored from solid color fabrics. Blazers are often made with naval-style metal buttons, reflecting their historic boating club association.

Blazers come in different colours and different styles like the sleeveless blazers, photos below..

Photo of sleeveless blazer from SS!3 below