Reference article
Jack frost costume
Jack frost costume is a costume with 45% base battle protection.
Protection and elements
This item supplies 45% base protection. Its resistance is ice and its weakness is fire. In battle, resistance doubles the item’s protection contribution and weakness halves it. Endurance and the other equipped armour piece also affect the final damage.
Buying
Buy it when stocked in the relevant shop. The inspected desktop/console price is 1340 bronze-equivalent 
Coins; iOS, Android and CrazyGames use 2680. Stock depends on shop type and the duck’s progress.
Equipment mastery
Owned equipment accumulates mastery during battles. Mastery changes equipment performance; see 
Equipment for the shared system.