Mission Workshop is primarily known for which category of clothing?

Mission Workshop is primarily recognized for its focus on outerwear and casual shirts, which is anchored in the brand's commitment to producing highly functional and durable clothing suitable for urban environments. Outerwear is a core category for Mission Workshop, where the brand emphasizes the use of innovative materials and construction techniques to create versatile jackets, coats, and shells designed to withstand various weather conditions while offering a sleek, modern aesthetic.

Additionally, casual shirts are part of their offering, aligning with the brand's overall philosophy of merging style with performance. Their garments are often designed with practicality in mind, catering not just to fashion but also to the needs of active urban dwellers.

By creating outerwear that combines functionality with stylish design, Mission Workshop establishes a strong identity in the outerwear category, making it the correct answer in this context.