A blazer's cloth is usually durable, as it is intended as an outdoor jacket. Blazers are often part of a uniform that denotes, for example, an airline's employees, students of a particular school, members of yachting and rowing clubs, and athletes on a particular team.
Sherwani s a long coat-like garment worn in South Asia, very similar to an Achkan or doublet. It was traditionally associated with the aristocracy of the Indian subcontinent.
A shirt is a cloth garment for the upper body. Originally an undergarment worn exclusively by men, it has become, in American English, a catch-all term for a broad variety of upper-body garments and undergarments.
Kurta is a piece of clothing worn by males of all ages preferably by older men and politicians in India who use white colour, while the young men wear the Kurta in brighter colours and middle or older aged men wear the Kurta in white and off-white colours.