Aayush wanted to buy a new shirt while visiting Rajasthan in the summer season. Which shirt he should avoid while buying?

As polyester is a synthetic fiber, the shirt made up of polyester will not be able to absorb sweat in  the summer season in Rajasthan. So,  Aayush should not buy a polyester shirt.

 On the other hand, shirts made up of natural fibres like cotton, wool, and silk easily absorb sweat and water, hence should be worn in summer season.