As vinyl is a synthetic material, it is not breathable like leather and therefore is not usually used regularly to make jackets and other pieces of clothing. It is also not as durable as leather and often splits or cracks much more easily.
The right upper quadrant (RUQ in the illustration) contains very significant organs, or at least portions of them. Within this quadrant you'll find the right portion of the liver, the gallbladder, right kidney, a small section of the stomach, part of the colon, and sections of small intestine.
In comparison to the 4 quadrants, most organs are part of multiple regions in this schema, because the individual regions are smaller, such as the gallbladder, duodenum, stomach, kidneys, spleen, the small intestine and colon.