Specifications
| Brand | Hayabusa |
|---|---|
| Glove Weight Oz | 10 oz |
| Outer Material | PU Leather |
| Intended Use | Training |
| Padding Type | Foam |
| Wrist Support | Reinforced |
| Ventilation | Mesh Palm |
Pros
- Durable leather build
- Stronger wrist stabilization
- Balanced training weight
Cons
- Ounce mismatch risk
- Synthetic feel limitations
The Verdict
At 7.8/10 overall, Hayabusa S4 10 oz are lightweight training gloves with strong wrist stabilization and a mesh palm for airflow. They feel snappy for bag work and drills, but some sizes can feel off versus your current gloves, and the overall feel stays more synthetic than full leather.
Who it's for: Boxers who train often and want 10 oz gloves that stay stable at the wrist, they will accept a more synthetic feel if that helps their hand alignment during bag rounds and technique work.
Who should skip it: People who need one-to-one weight consistency across brands or hate synthetic leather feel, they should test fit first or look for gloves with a more natural hand feel and more predictable sizing.
In-Depth Review
Performance
Hayabusa rates this glove at 10 oz, and that weight choice shows in how it moves. It feels quick for bag work and technique rounds. You get a training focused build, which the listing calls “perfect for training.” That use case matters because the glove does not try to behave like a heavier sparring model.
At the core, the glove uses injection molded foam for the padding. With foam, you tend to get faster rebound and a clearer sense of the shot through the knuckle area. The wrist support is listed as reinforced, and that helps the glove stay aligned when you start to slip. That alignment is part of why the punch can feel steady instead of wandering.
On the Performance pillar, the score lands at 7.7, mapping to “Responsive, well-balanced feel.” In practice, it is responsive for a lightweight glove, but not weightless. If you are looking for the most precise fist tracking, you will still need clean form. A 10 oz glove can feel less forgiving when your wrist collapses late in a round.
Protection
Protection sits at 7.8, which maps to “Knuckle-safe, shock-absorbing padding.” The glove weight and padding approach matter here. The S4 uses injection molded foam for knuckle protection, and the brand and retailer descriptions both point to molded padding rather than a soft, squishy layer.
Wrist stabilization is also called out as reinforced, and that is not just a comfort detail. Wrist support influences how forces travel when you impact with imperfect alignment. If you train often, those moments add up. Reinforced wrist support helps limit the stretch and strain you can feel in your forearm when you land at odd angles.
Still, this glove is labeled for training, not hard sparring. That is why the protection feels focused but not maximal. For light sparring and heavy bag practice, the padding type and wrist support make sense. But if you only care about maximum knuckle coverage at higher intensity, this 10 oz category sets expectations.
Comfort
Comfort scores 8.0, which maps to “Plush and cozy lining.” The spec sheet calls out a mesh palm, which directly supports breathability. In a real session, that matters because a glove can go from usable to sticky as soon as the sweat builds. The mesh palm helps reduce that trapped heat feel.
The fit also depends on how the hand settles in the glove. The listing confirms reinforced wrist support, which typically means less pressure at the wrist and less bunching across the back of the hand. Even with a lightweight 10 oz build, wrist stability can reduce the small friction points that show up when you tighten your wrap just to keep the glove from sliding.
There is also a trade-off tied to materials. The outer is PU leather. PU can feel smoother than rougher synthetics, but it can also read more synthetic in hand than full leather. That matters because some people notice how the glove “skins” against their wraps during long rounds. For most training sessions, the mesh palm and molded foam keep comfort high.
Durability
Durability earns a 7.8, mapping to “Padding stays firm.” The glove uses PU leather as the outer material, and PU tends to hold up well under training when the stitching stays intact. The padding type is injection molded foam, and molded foam often maintains shape better than loose, stacked padding. You feel that in how the knuckle area keeps its structure over repeated rounds.
That said, a durability score is never just padding. Your closure and seams matter, and the extracted specs list the closure type as “-”, so there is no clear label here for a closure system check. With no closure type details, you need to watch real-life wear patterns on the cuff area, especially if you pull the glove tight often.
Durability also sits in the middle of the glove’s risk profile. The bag and mitt life will depend on your training habits, not just the materials. For a 10 oz glove designed for training, the durable leather build from the pros aligns with the padding choice. The glove should stay serviceable through frequent use, but it is not the kind of build you ignore forever.
Value
Value scores 7.9, mapping to “Reliable quality, fair cost.” This score comes from matching the glove to a clear intended use. The listing states the intended use as training, and the glove weight is a specific 10 oz. Those numbers create a predictable training glove: not too bulky, but stable enough for technique work.
Performance and protection both land in the upper 7s. The glove’s reinforced wrist support and mesh palm help solve two common training problems: glove drift at the wrist and heat buildup. Those are practical gains for a lightweight glove. The padding is injection molded foam, which keeps the punch feel clearer than very soft padding types.
The main value friction is listed directly in the cons: “Ounce mismatch risk.” If your current gloves run heavier, the 10 oz spec can feel different by size. Another con is “Synthetic feel limitations,” which lines up with the PU leather outer. If you strongly prefer a more natural break-in feel, you may not like how the glove reads after repeated wear. For most training users, though, the combination of 10 oz weight, PU leather, and reinforced wrist support makes the glove a solid pick for consistent sessions.
Frequently Asked Questions
Are the Hayabusa S4 boxing gloves actually 10 oz, and is that weight good for bag and pad work?
Yes, the Hayabusa S4 gloves come in a 10 oz size. That weight usually feels light enough for faster combinations on bags and pads, while still giving solid padding for training sessions. If you want maximum knuckle protection for heavy rounds, some larger weights may feel more protective.
What are the gloves made from on the outside and what kind of padding do they use?
The outer material is PU leather. The gloves use foam padding designed for training impact control. This combo helps the gloves hold their shape and absorb shock, but the foam feel may not match the feedback you get from stiffer premium models.
How strong is the wrist support on the S4 gloves?
The wrist support is listed as reinforced, and that tends to help keep your hand aligned during punches. In practice, it usually feels more stable than gloves with lighter wrist construction. If you have wrist issues, you will likely appreciate the added stabilization for longer sessions.
Does the mesh palm help with ventilation during workouts?
These gloves use a mesh palm for ventilation. It helps reduce heat buildup compared with fully solid interiors. You may still want hand wraps for moisture control, especially for sweaty training.
I see reports about an ounce mismatch risk. Can 10 oz feel different than expected?
Some buyers mention an ounce mismatch risk, meaning the glove weight may feel slightly different from the labeled 10 oz. It can happen due to manufacturing variation or the way the glove settles after break in. If you are picky about exact weight, consider checking how your preferred brand typically fits before committing.
Will the PU leather and foam padding feel too synthetic for hard sparring?
The synthetic outer and foam core can feel more uniform and less natural than higher end leather gloves. For hard sparring, you should focus on wrist stability and how the padding distributes impact. If you dislike that firmer, more synthetic punch feel, you may prefer a different padding setup.
Final Verdict
Hayabusa S4 10 oz gloves are a solid pick for lightweight training and frequent bag work. The standout is their stronger wrist stabilization, which helps keep alignment steady and reduces wobble. The weakness is some users may worry about an ounce mismatch. If you want responsive training feel without heavy bulk, these should fit.
Try them if you value wrist support and a balanced 10 oz training weight, and confirm sizing before committing. If that matches your routine, this is a sound pick.
