Can a lifter wear both a t-shirt and a supportive shirt during competition?

In powerlifting competitions, the regulations set forth by the International Powerlifting Federation specify that lifters are allowed to wear a single supportive garment during their lifts to maintain a standard of fairness and uniformity in equipment. Supportive shirts, such as bench shirts, are designed to provide additional support and assistance during the lift.

Wearing both a t-shirt and a supportive shirt at the same time creates an unfair advantage, as the additional layer could enhance the lifter's performance beyond what is considered acceptable under competition rules. This is why the rules clearly prohibit combining a standard t-shirt with a supportive shirt during the actual competition lifts. Only one type of supportive garment is permitted to ensure that all lifters follow the same equipment guidelines, thus maintaining the integrity of the competition.