Hayabusa built its Dual-X closure and Fusion Splinting system to solve one specific problem: wrist wobble under repeated impact, and it's the single biggest difference between the brand's boxing glove tiers. The T3 carries that full system, two interlocking straps plus a splinted internal frame that locks the wrist in place, along with a Locked Thumb that keeps the thumb anchored to the rest of the glove instead of floating loose during clinch work or a missed block. It's built on Vylar engineered leather with Deltra-EG multi-layer foam underneath, a combination aimed at absorbing knuckle impact without going dead and unresponsive after a few months. Hayabusa also sells the T3 in a Kanpeki finish, drum-dyed leather in richer colorways, but it runs the identical Dual-X and Locked Thumb architecture underneath, so treat it as a color choice inside the T3 tier rather than a step up in protection. For fighters who spar two or three times a week, that splinted wrist support earns its keep.
Step down to the S4 and the difference shows up immediately at the wrist: one strap instead of two, no locked thumb, and a PU leather shell that trades the T3's density for a lighter, more flexible glove. The S4's PU shell also breaks in faster out of the box, which some beginners like, but that same softness is exactly why it doesn't hold its shape as long once sparring rounds pile up. Choose the S4 if you're mostly doing pad work, technique drills, or occasional bag rounds, because the extra wrist architecture in the T3 line is solving a sparring-frequency problem you may not have yet. Push the S4 into heavy, regular sparring and the single strap tends to loosen faster than a dual-strap setup, which is the honest trade-off of the lighter build.
T360 is the newest addition to the lineup, and it approaches wrist support differently rather than just adding more strapping. A triple-splint frame and a curved knuckle pocket aim to align the hand in a more natural punching position, with a removable inner strap that lets each hand get a slightly different fit. A leather version of the T360 exists too, trading the standard shell for a more structured feel while keeping the same triple-splint frame underneath. Try it on before assuming it replaces the T3, because the ergonomics suit some hand shapes better than others.
Between the S4 and T3 sits the E1, aimed at boxers past the beginner stage who still don't need full competition-level wrist support. It keeps dual splinted padding for wrist protection but skips some of the premium foam layering, and the leather version uses top-grain leather that breaks in and molds to the hand over repeated use rather than arriving pre-shaped. Sizing on the E1 follows the same oz range as the rest of the line, and the extra wrist support matters most once pad rounds start running long.
For sanctioned competition, the Pro Horsehair glove is a different animal entirely: a horsehair-and-foam blend that trades some of the cushioning newer boxers expect for tighter knuckle feedback, the kind coaches look for when judging a fighter's technique in the ring rather than protecting hands through months of bag work. The trade-off is deliberate: horsehair compresses less over time than foam alone, so the feel stays consistent round after round for a fighter who's already dialed in their technique. It's not the glove to reach for if daily heavy bag rounds are the main use case; the padding simply isn't built for that kind of repeated blunt impact.
The Mayweather Contender and Champ gloves sit on similar dual-splinted wrist architecture to the mainline models, dressed in the collaboration's own colorways, so the collectible design doesn't necessarily mean a different protection tier than what's already in the lineup. Both collaborations still carry the dual-splinted wrist support that defines Hayabusa's mid-to-upper tier; they're not stripped-down novelty gloves. Check which base construction a licensed edition is actually built on before assuming it's a step up, the same goes for the Marvel collaboration gloves.
Across the Hayabusa Boxing Gloves lineup, sizing runs the standard boxing oz range, and fit comes down to closure type as much as glove weight: dual-strap models lock down tighter for hands that tend to shift inside the glove mid-round, while single-strap builds suit boxers who value getting gloves on and off quickly between rounds. Every leather model needs a short glove break-in period before the padding molds fully to your hand; foam alone won't tell you that, only repeated wear will. Spending on Pro-tier or T360-level wrist tech for gear that mostly sees light bag work wastes the part of the price that's actually paying for durability under frequent sparring stress. Buy for the training load you actually have, not the one you're planning to eventually reach.
