The shirt features a very colorful and psychedelic design on the front. It seems to depict an underwater scene with swirling patterns and cartoonish fish in vibrant shades of orange, teal, and pink. Overlaid on this busy background are the words "PRESSURE PRESSURE PRESSURE" stacked vertically in a bold, slightly bubbly yellow and orange font with a black outline. Below that, in a smaller, simpler orange font, it says "PRRHUSE CLOTHING Inc".

Turning to the back of the same dark navy blue shirt, the design is much simpler. It displays the text "PRESSURE" in large white letters stacked above "CLOTHING INC" in a slightly smaller light blue font. Below that, centered and in a smaller white font, it reads "EST. MMXXV".

So, it's a single t-shirt with a wild, colorful graphic on the front and a more minimalist, branded design on the back. Thanks for pointing out my error!