A blonde wig.
Blonde Wig is a key item received at Wall Market from the Gym if the player wins the squatting minigame. It is used during the Tifa rescue mission, being the top tier wig that helps get Cloud chosen by Don Corneo when the former dresses as a woman.
Blonde Wig is a level 90 helmet that provides 54 Defense and can be bought for 2,893 gil.
Blonde Wig is a level 43 special helmet that provides +169 Bravery and is 1/4th of the "Allure of Honey set". It can only be equipped by female characters, Cloud, and Kefka, and is obtained from the shop by trading 6,550 gil, Ruby x5, and Allure Shard x2.
Blonde Wig is a level 30 special helmet, providing the same bonuses as before and equippable by the same characters as before.