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 left upper quadrant (LUQ) contains similar organs to the RUQ. In the LUQ you'll find the left portion of the liver, the majority of the stomach, pancreas, left kidney, spleen, portions of the colon, and (again) parts of the 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.