The Havel training shirt is entirely made from poly dry fabric. The bottom of the shirt has a straight line that ends in a dr... The Havel training shirt is entirely made from poly dry fabric. The bottom of the shirt has a straight line that ends in a drawstring so you can adjust the tightness. The reversed zip on the neck, with its lycra-hemmed wrist and piping detail on the shoulders, complete the look of this shirt while making it extremely practical.