I see SteavezoPlays wearing this hat

[AltroG]

I see SteavezoPlays wearing this hat in-game. Is that some sort of cosmetic on pikanetwork, or is it something to do with tlauncher?
here is a picture

https://imgur.com/jdJ78D7

View: https://imgur.com/jdJ78D7

 

[BlakD3mon_]

its an optifine cape perk u cant get it with tlauncher

 

[Deleted member 118315]

its an optifine cape perk u cant get it with tlauncher

Can u explain how ?

 

[BlakD3mon_]

buy an optifine cape? lol