https://imgur.com/a/hIpQEFa
It's an arm sleeve. It's usually used for glass pads, but can also be used with cloth.
https://www.pulsar.gg/collections/arm-sleeve/products/es-arm-sleeve-size-l?variant=47104992968958
This one to be exact.
im about the wrist
mb i should have asked question more precisely
i'm assuming it's a brace of some kind
It's an arm sleeve, used to reduce friction.
arm is pulsar arm sleeve hand- glove of some sorts to do the same thing idk which brand tho