UNDER ARMOUR Active Top Lonh Sleeve Size Medium

Pullover with zipper up starting at center of front. High collar, zipper pocket on sleeve, Pocket on back. Thumbholes. In EXCELLENT Like NEW Condition. Worn once if at all, shows no wear. Material tag was missing when I received it off pallet. I'm assuming poly/spandex. Size was also missing but it measures 17" across the bust and is 28" long. The 17" across would be approximately a medium but with the stretch in it I would lean more towards a medium/large. ATHTLS05L05M