Champro's whistle ref shirt features a ring in the v-neck collar to easily attach a whistle lanyard. This basketball officials' shirt is made with dri-gear®, a printed air fabric with 100% polyester bird's eye mesh to keep you cool on the court. The whistle basketball referee shirt is reinforced with rib-knit cuffs and comes with standard 1" referee stripes. The extended back tail with side vents allows for a better fit and extra comfort.