Shiny Shorts are made of polyamide, mainly polyamide 6.6 also called 'Nylon'. The material can have many different characteristics but when they are processed in a determined way it has a silky touch and the shiny look. The shorts vary but one can distinguish between three basic models. For example the classic sprinter short which is high cut on the side and rounded at the corners. Overlapping front and back are stitched together on the side. Or there is the model which I call the 'Short Short'. When it is an adidas short it will often be one of the famous 'Beckenbauer' models. Some of them have a little side slit. And finally there is the 'Long Short' model which is more of a boxer-shorts type. They also can have a little side slit.
All these shorts have an elastic waistband, a tie cord, except most sprinter models, and a back pocket. Nearly all do also have an inner slip which is often removed to enhance the Feeling.  
The patterns are quiet conform and there are three main styles. The plain (1) material is the most frequent, next are with shades (2) and pinstripes (3). The last pattern is only used by puma and is very rare.