4 Gear Luffy Episode -

Episode 726 – Luffy inflates his muscular structure and coats his body in Armament Haki to gain a balance of flight, speed, and overwhelming power.

: Luffy coats his forearm in Armament Haki , bites into it, and blows air directly into his muscles.

"The Climax of the Fierce Battle! Gear Fourth vs. Doflamingo" Episode Number: 726 Arc: Dressrosa 4 gear luffy episode

Despite Luffy’s best efforts with Gear 2 and Gear 3, Doflamingo was barely scratched. The villain’s arrogance was at an all-time high; he looked at Luffy not as a threat, but as a nuisance. Luffy needed something new—something he had been secretly honing during his two years of training on Rusukaina Island.

Luffy first uses in Episode 726 of the One Piece anime, titled "Gear 4! The Phenomenal Boundman!". This debut occurs during the climax of the Dressrosa Arc during his high-stakes battle against Donquixote Doflamingo. Key Gear 4 Episode Guide Episode 726 – Luffy inflates his muscular structure

When Doflamingo tried to kick Luffy, he was bounced back. When he tried to slice him, the blade glanced off the bouncy tension. Luffy explained it best:

Luffy revealed that he coats his body in Armament Haki, inflates his muscles like a balloon, and then uses the Haki to keep the air trapped inside. This creates a rubbery armor that defies physics. Gear Fourth vs

While Gear 5 currently holds the crown for the most creative transformation, Gear 4 remains the fan-favorite "cool" factor. It was the moment the rubber boy became a king.