Not all black t-shirts are created equally.
The company took seven black t-shirts from various different brands, ranging in price, and covered their labels. They asked different people to try and identify which brand belonged to which t-shirt. The participants ranked the t-shirts and soon discovered how wrong they were. They critiqued the design and fabric of the expensive ones while they complimented the inexpensive, run-of-the-mill shirts.
As it turns out, a Prada label and $280 price tag on a black t-shirt makes it seem better made and nicer than a $5 black Hanes t-shirt from Target, regardless of the fact that it may not be as well-made.
Maybe instead of splurging on an overpriced shirt, run to the local drugstore and save money and quality.