This outfit is a traditional men's ethnic wear ensemble, commonly called a Kurta Pyjama.

Kurta:
The top garment is a knee-length kurta that is predominantly navy blue or royal blue with an all-over white print. The pattern is identifiable as a traditional Ikat print or geometric print, a style where the fabric yarns are resist-dyed before weaving, creating the distinctive blurred or jagged edges in the design. The kurta features a stylish mandarin collar, also known as a band collar, and a straight hem. The material is often a comfortable fabric like pure cotton or a cotton blend.

Pyjama:
The bottom wear consists of solid white or off-white pyjamas, which are loose-fitting trousers typically made from a lightweight cotton fabric for comfort. They usually feature a drawstring or elasticated waistband.