Praying while wearing a straw cap
Often, people keep straw caps in mosques for the use of worshippers with the intention of gaining reward. Since a person does not like to go to other gatherings wearing them, but rather considers it inappropriate, these caps fall under the ruling of 'Thiyab-e-Bidhla' (inferior/work clothes). Therefore, performing prayer while wearing such caps is Makruh Tanzihi (mildly disliked). (Aham Masail / Vol: 1 / Pg: 57)