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A blazer is a type of jacket resembling a suit jacket, but cut more casually. A blazer is generally distinguished from a sport coat as a more formal garment and tailored from solid colour fabrics. Blazers often have naval-style metal buttons to reflect their origins as jackets worn by boating club members.
A blazer's cloth is usually durable, as it is intended as outdoor wear. Blazers are often part of a uniform that denotes, for example, an airline's employees, pupils of a particular school, members of sports clubs, or sportsmen and women on a particular team.