Somebody is perfect

Exemplarily matched pieces
If a shirt features another fabric in its trimmings, that is on the inside of its collar and cuffs, perhaps even one with a pattern, that is already very decorative in its own right.
This effect is heightened further when a second piece displays the same pattern, for example, the back of a vest – as this combination by OLYMP impressively demonstrates. 
 It's a perfect match. 

The pullover with matching shirt provides a duplication of pattern which, in its semi-formal form, is perfectly suitable for business.
It’s really cool to combine this for a Saturday in the city with a white round neck T-shirt which, with deliberate slackness, isn’t tucked in.