What is a "doublet"?

A doublet is a fitted men's jacket that originated in Europe in the 14th century. It was worn over a shirt and usually reached to the hips or mid-thigh. Doublets were often made of rich fabrics such as silk, velvet, or brocade, and were adorned with elaborate decorations such as embroidery, jewels, or gold trim. Doublets had a wide range of styles and designs, ranging from simple and practical to highly decorative and ornate, depending on the wearer's social status and the occasion for which it was worn. Doublets were a popular garment among aristocrats and nobles and were commonly worn as part of formal attire or for courtly events.