They may be on the higher=price area.
However, a few years ago I went on an off-site tour of the Park Production Center, which does all the shirt silk screening, embroidery, and embossing. At one side I saw two Kenmore washers and dryers. and boxes of a major brand detergent. Any time they get in a new shipment of shirts, threads, or paints they will take more than a dozen shirts (randomly selected from withing the delivery) and silk screen or embroider a special test pattern which they use. They will then run them through at least ten wash and dry cycles. If the shirts shrink, the colors run or fade they will reject the batch.
So they are paying higher prices than normal due to their requirements of higher standards than most other companies.
In other words, you are paying for the Quality Control.