Suitsupply is recognized for which of the following clothing items?

Suitsupply is primarily known for its tailored suits and formal wear, offering a range of clothing items, but polo shirts are not their core focus. The brand is recognized for its dedication to high-quality craftsmanship in tailored clothing and bespoke suits, which cater to professional and formal occasions.

While they may offer some casual wear options, the standout feature of Suitsupply's product line is their extensive variety of suits, blazers, and dress trousers, which aligns with the brand's image as a purveyor of smart and tailored attire. Therefore, the correct answer emphasizes the brand's specialization in formal wear rather than casual or athletic items.