From Dragon Quest Wiki
The pop socks are a piece of legwear introduced in Dragon Quest IX.
|Pop socks (DS)
|2% chance in Rank 1 chests
|Foot coverings for females that fit the leg up to the knee.
|Sold at the secret shop in Dourbridge.
Exclusive for women.
Upgrades to Chainmail socks, Green tights, Red tights, or White tights