Running tights.
Youth Sports Form Fit, Ankle Length Compression Tight-Stay Dry and Cool During Football, Baseball, Dance, Track, and Soccer with Moisture Management and Anti-Microbial Technology-Sizes YS, YM, YL (Youth Medium, Black) https://www.amazon.com/dp/B007A2T8CM/ref=cm_sw_r_awd_8sxhub18SB6FF