I don't think anyone makes 100% cotton nightwear anymore. I've been told over and over again that any artificial material will melt and stick to your skin in the fire, so I'd have a hard time accepting a piece of polyester fabric as sleepwear. But the young man wearing them doesn't care. He is a very slim young man and the medium suits him well. However, because the material doesn't stretch, the shorts can contract as you move. A yellow tie is something unusual. a simple elasticated waist would suit him better.
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