What material should t-shirts be made of according to specifications?

T-shirts used in powerlifting competitions are specified to be made from fabric or synthetic materials. This ensures that the shirts are breathable, comfortable, and capable of standard wear during lifting activities. Fabric materials such as cotton or polyester blend allow for movement and flexibility, which are essential for athletes during their performance.

Using fabric or synthetic materials also provides durability necessary for the physical demands of lifting. Unlike the other options, which either suggest materials that could impair performance due to rigidity (like elastic or rubberized) or materials that could be non-breathable (such as plastic or vinyl), fabric and synthetic fabrics strike the right balance between comfort, functionality, and adherence to the rules of competition.