Im pretty sure its either a mcdavid arm sleeve or a nike arm sleeve
mcdavid
There's the companies 2XU, Adidas, Nike, Zensah, McDavid, and Evoshield. There are many more companies that sell compression arm sleeves, but these companies were considered the best.
Dick's Sporting Goods
He has a sleeve tattoo on his left arm, but a half sleeve on this right arm
Tattoos can be applied to one's arm in full sleeve or half sleeve applications. The main difference between full sleeve tattoos and half sleeve tattoos is how much tattoo covers the arm.
Sleeve
Allen Iverson
to keep his arm safe
Allen iverson
New Answer: It is probably an Apollo scuff pad from PRO Orthopedic. Justin Morneau uses a Phiten arm sleeve. Phiten
She wore a green sleeve and visual effects were added and she also wore several "prosthetics" for certain scenes like when the attack happened so the stump of the arm could look bloody and such.