This is a youth boy's baseball tee in a size YXL from Eastbay.
They are red and grey and feature a round neckline, long sleeves, and a straight hem.
This shirt measures about 15" from underarm to underarm, 16.5" from the neckline to arm cuff, and 24.25" from the back of the neck to the hem when laid flat.
It was made from an 84/16 polyester/spandex blend.
The shirt is in very good pre-owned condition.