Overshirts, also known as "shackets", are a mix between a shirt and a jacket, heavier than a regular shirt but lighter than a jacket. They're made from durable materials like denim or flannel, and work well as a versatile layering piece. Safari jackets are lightweight, belted jackets with multiple pockets, usually made from breathable materials like cotton or linen. They're practical and popular for casual, outdoor, and travel wear.