coir is a rough fibre if shirts can be made you will feel itching and will have scratches and plus coir is extra flamable, the advantages are that coir can keep your body cool
Coir is not used to make shirts because coir is a rough fabric.Wearing shirts made of coir may itch our skin and we may get rashes or other skin problems.Coir is also highly flammable so it is not used to make shirts.