Silk Tie
Question :

If my tie is made of silk, is it permissible to wear it if it is worn over my shirt and not directly touching my body?

Answer :

It is prohibited for men to wear if it is made from pure silk. Based on compulsory precaution, it should not be worn during the prayer; if it is worn in prayer, the prayer is invalid.

Wearing Silk
Question :

Is it permissible for me (as a man) to wear silk?

Answer :

It is not permissible for a man to wear natural silk.