The Yiga Tights are an armor piece found in Tears of the Kingdom.
Tears of the Kingdom
"Tights supplied to members of the Yiga Clan. The soft material on the soles silences footsteps, but protection is lacking due to the light material."
Enhancing Armor requires that Link has unlocked as many Great Fairy Fountains as the desired star-level.
|★||3||2 x Octorok Eyeball
|★★||5||3 x Fire-Breath Lizalfos Tail
3 x Puffshroom
|★★★||7||5 x Ice-Breath Lizalfos Tail
5 x Keese Eyeball
|★★★★||12||5 x Electric Lizalfos Tail
3 x Black Hinox Horn
10 x Mighty Bananas