Only tried on, unfortunately it is too big for me. Size 40. Perfect for midsummer. Small key pocket. Information from Gorewear about the jersey: The GOREWEAR Spinshift Breathe short-sleeve jersey is ideal for hot summer days. To ensure high temperatures don't affect you, this GOREWEAR cycling jersey is made of a super-lightweight mesh fabric with particularly high air permeability, which provides constant ventilation while riding.