The slim-fit Slam top is ultra-breathable with stretchy stretch fabric that doesn't cling to your body. Dri-FIT ADV technology helps keep you dry and comfortable through every rally. Nike Dri-FIT ADV levels up our sweat-wicking technology with advanced cooling and zones of breathability to help you stay dry and comfortable. Four-way stretch knit fabric is lightweight and breathable. The shoulder seam placement gives a free feeling as you swing. Extended back hem provides extra coverage.