A cavalier and mask is a unique Treasure Trail item. Rather than being obtained directly, it is made by taking a Black cavalier and a Highwayman mask to Patchy on Mos Le'Harmless, who can sew the items together for 500 coins. Patchy will also disassemble the two items, for another 600 coins. A black cavalier can be obtained from level 3 clue scrolls, while a highwayman mask can be obtained from level 1 clue scrolls.
This item is affected by the "short hair" glitch, in which the player appears to have the "short" hairstyle when wearing it, no matter which style they normally have.