Unlike Gear 3rd, which inflates bones, Gear 4th involves Luffy coating his arm in Haki and biting into his forearm to blow air directly into his muscular structure .
The gear 4th form gave Luffy a massive boost in strength, speed, and agility, making him nearly unbeatable in combat! luffy 4th gear first time episode
This first variation gives Luffy a massive, spherical torso and heavily muscled limbs coated in tribal-patterned Haki. Unlike Gear 3rd, which inflates bones, Gear 4th
Rebecca, watching from a crumbling tower, felt her heart stop. “What is he doing?” Unlike Gear 3rd
Have you rewatched this episode recently? What are your thoughts on Luffy's 4th Gear transformation? Let us know in the comments!"