Sports Product Design: How the Hand Tennis Glove Was Engineered

Sports product design is the discipline of designing equipment whose performance is decided by a human body in motion, which means the only real test is play. Requirements are physical - rebound, spin, grip, shock, wear - and they are verified by athletes on a court, not by a review meeting. This is what that looked like on one project: turning a taped-together prototype into production equipment for a brand-new sport.

Anthony Soto came to us with an idea most people have had without acting on it. Anyone who has swatted a tennis ball back over the net with an open hand knows how good it feels - and how quickly it stops working. Bare hands sting, control is inconsistent, and the ball dies on impact. He had built a crude hand-made prototype and played with it enough to know the concept had legs.

The target was specific: an MMA-style glove crossed with a hard, pickleball-like striking face, worn on the hand, capable of hitting a standard tennis ball on a standard court. Not a toy, not a paddle with straps - a glove that plays.

Almost every difficult problem on this project sat in the striking pad, and its requirements pull against each other. Off-the-shelf materials failed one or another: soft elastomers absorbed the ball and gave no depth; rigid plastics bounced well but cracked, transmitted shock straight into the hand, and refused to move with the glove. The answer was not a catalogue part. It had to be developed.

We started with the hand. The glove had to load impact into the heel and palm rather than the fingers, keep the wrist free enough to swing, and stay on through a full point. From that ergonomic study we developed the architecture in CAD: the pad profile and its crown, the leather panel layout, the strap and closure, the seam lines, and the transition between the rigid face and the flexible body.

Each revision was driven by play, not opinion. The CAD carried the geometry; the courts decided whether it was right.

This was the core of the engineering effort. We prototyped and tested a long series of rubber and plastic blends, varying hardness, filler content and the ratio between the elastomeric and rigid phases - then hit real tennis balls with each one.

Candidates were scored the way a player would score them: rebound height and shot depth, spin generated on slice and topspin, sound and feel at impact, shock transmitted to the palm, and surface condition after extended hitting. Blends that were too soft swallowed the ball.

Blends that were too hard were unforgiving and abraded the ball. Several performed well on day one and glazed over after a week of play - which is why durability has to be tested over weeks, not sessions.

The composition we converged on hit every mark: consistent bounce, real spin, a controlled amount of flex, no premature wear, and full compatibility with the leather construction and the production process behind it.

Every iteration surfaced a different manufacturing problem, and the most stubborn was stitching. To keep the striking face flat and fully supported, the seam had to run very close to the edge of the pad. But a seam that close to an edge is exactly where a glove tears first, and every hit loads that line directly.

We worked through it with revised seam allowances, a reinforced binding at the pad perimeter, changes to stitch pattern and thread, and adjustments to the pad edge geometry itself so the material carried some of the load instead of leaving it all to the thread. Later iterations refined the closure and strap, the pad-to-leather bond line, and fit across hand sizes.

With the design proven on court, we prepared it for production: tolerances and material specifications, tooling-friendly pad geometry, a panel and assembly sequence a glove factory could actually run, sizing, and the documentation needed to quote and produce it. Then we produced the first articles - the first real, sellable samples of the glove - followed by a short-run batch. Daymond John tried a pair and gave the glove his own stamp of approval.

Sporting goods are judged by feel, and feel is not a simulated quantity. Rebound, damping, grip and fatigue all live in the interaction between a body and a material under load, so every meaningful decision on a project like this is settled by making samples and hitting things with them. Simulation narrows the candidates; the hand decides.

On this project the pad worked and the glove worked; what kept failing was where they met. That is the norm in soft goods. A rigid or semi-rigid element stitched into a flexible one concentrates every impact at the seam, and the thread cuts the substrate long before either material wears out.

Fixing it is unglamorous work - reinforced binding, revised seam allowance, a different stitch pattern, sometimes a bonded layer under the stitching - and it is the difference between a demo and a product.

Sports products live or die on claims, and a claim you cannot evidence is a liability. Before the tuning rounds start, write down what you are measuring, how, and what result counts as better. It removes the argument that otherwise consumes every review meeting, and it produces the data you will need for packaging copy and for retail buyers who ask.

Sewn products are made by people, so consistency is a process question rather than a tooling one. The prototype sewn by a skilled sample maker is not what a production line will produce unless the construction is simplified and documented. Expect to spend real time on a tech pack - stitch types, seam allowances, reinforcement points, material tolerances - and expect the first production lot to reveal one construction step nobody can do quickly.

Every meaningful decision on a sports product moves at least two of these three, and usually in opposite directions. Making the trade explicit early stops the project from oscillating - a team that has agreed which of the three wins can settle a material question in an afternoon instead of a month.

Suppliers cannot help with a brief written in adjectives. Give them the load case - mass, velocity, contact area, repetition - the temperature and moisture the product lives in, the thickness you can afford, and the target price per unit area. With those five numbers a good supplier will shortlist grades in a day; without them you get a catalogue and three wasted weeks.

Feedback from players is the most valuable input on a sports product and the easiest to collect badly. People are polite, they want the inventor to succeed, and they rate whatever they used most recently as best. Structure the sessions so the honest answer is the easy one.

A new category has no shelf price to anchor to, so buyers price it against the nearest thing they understand. Work out what that comparison is - a premium glove, a training aid, a piece of protective gear - because it sets the ceiling regardless of what the product cost to make. If the landed cost will not support a price near that anchor, the answer is usually to simplify the construction, not to argue with the market.

The order matters more here than in most categories, because feel cannot be evaluated until something exists and every later decision depends on that evaluation.

If it involves a moulded or overmoulded component, the prototype cost calculator will bracket the build cost, and our discovery engagement covers the first three steps as a fixed piece of work.

Start from products that resemble yours in construction rather than in category - the factory that makes technical gloves is a better fit than one that makes tennis accessories. Ask for a paid sample before any order; a sample tells you more about a factory in three weeks than any amount of correspondence, and paying for it puts you in the queue as a customer rather than an enquiry.

Only ones you can evidence with your own test data, and the wording has to match what you measured. A claim of measured energy return under a stated test is defensible; a claim of injury prevention is a regulated medical-adjacent statement that needs far stronger evidence. Decide which claims you want early, because they determine the testing you have to fund.

Not to launch, but you need credibility from somewhere. Coaches and clubs are cheaper and more persuasive than a famous name early on: a training facility using the product daily generates video, testimony and durability data at once. Save paid endorsement for when you can supply the demand it creates.

Knowing when it is finished. Feel is subjective, every round produces new preferences, and a team can tune a product indefinitely. The fix is deciding the pass condition in advance - a target on the rig, a score on the sheet - and shipping when it is met, then improving in version two with real customer data instead of opinions.

Build a rig. A fixed drop height, a clamped sample and a phone camera at high frame rate produce comparable, repeatable data for a few hundred dollars, which is all you need to rank candidate materials. Labs become necessary when you have to certify a claim or satisfy a retailer, not when you are choosing between samples.

Typically 300 to 1,000 units per colourway with a mid-size factory, and often 100 to 300 with a smaller sample-focused workshop at a higher unit price. Material minimums usually bite before the factory minimum does - performance foams and technical fabrics are frequently sold by the roll, which can set your first order size for you.

Often yes, on the mechanism or the construction rather than the general idea - the specific way an energy-returning element is integrated into a glove is the kind of thing a utility claim can cover, while a design patent protects the visual form. Start with a prior art search, because sporting goods is a crowded field and the search usually reshapes the claim before it costs you anything.

Eight to fourteen months to a saleable product. Material development and test rounds run four to seven months of that, the tech pack and factory sampling another two to three, and the first production lot six to ten weeks after the gold sample is approved. Products with a moulded component add tooling time on top.

For a soft-goods product with a custom performance element, expect $25k - $80k through to production-ready, with material development and physical test rounds the largest single line. Hard goods with tooling run higher. Our product development cost breakdown splits this by stage.

Plan four to six. The first two answer whether the idea works at all, the middle rounds tune the feel, and the last ones exist to break the construction on purpose so the factory does not discover the weakness for you. Teams that budget for two rounds almost always end up running five and paying for the surprise.

For a product with a custom material at its core, expect several months of iteration before design for manufacturing even begins. Material development runs in parallel with geometry, and each candidate has to be built and played with, which sets the pace. Products built from established materials move considerably faster because the testing loop is shorter.

Only when catalogue materials fail a requirement you cannot design around. On the Hand Tennis glove they did: soft elastomers killed the ball and rigid plastics hurt the hand. If an off-the-shelf compound meets your rebound, wear and comfort targets, use it - custom blends add cost, lead time and supplier dependency.

Enough that each one answers a question. On this project the iterations were driven by discoveries - a blend that glazed, a seam that tore, a strap that shifted during play - rather than by a fixed schedule. Plan for a series, not a single round, and treat each build as a test with a stated hypothesis.

Read the full project in the Hand Tennis glove case study. If you are developing equipment of your own, see our product design and rapid prototyping services, or estimate a build with the prototype cost calculator.