Stimulus T-shirts feature a quick-drying, ultra-soft Density Poly Knit fabric that offers excellent mobility in any direction. Micro Denier interlock uses extremely small fibers to create a soft and tightly knit fabric. Fully sublimated for vibrant, never fade color. 100% Polyester Loose Fit
https://www.stimulusathletic.com/sizechart
Youth Size Description:
20- Youth X Small
22- Youth Small
24- Youth Medium
26- Youth Large
28- Youth X Large
30 - Youth XX Large
https://www.stimulusathletic.com/sizechart