Precision cutting per size means each size is cut to its own pattern rather than simply scaling one shape up or down, so the fit stays true across the whole size range. It matters because straight grading distorts proportions, a small becomes too tight in the chest, a large too baggy at the hem, whereas per-size cutting keeps the fitted-chest, relaxed-stomach shape correct on every athlete, which is what makes a top move properly in a HYROX race.
- THETA's Tech T-Shirt Race Team v2 went through 20+ fabric and fit revisions and is precision cut per size, tested by the Elite 15 in real race environments across 2026 seasons.
- A HYROX race demands full overhead extension on the SkiErg and wall balls, so a top that fits wrong in one size restricts or flaps exactly where it matters.
- As of 2026, most mass-market tops are simply graded from a single pattern, which is why fit drifts at the extremes of the size range.
What does grading a garment actually mean?
Grading is the maths that turns one base pattern into a full size run. In the cheapest version of it, every dimension is scaled by a single fixed factor, so a large is just a small multiplied up. The number that breaks this is the human body: a larger athlete is not one uniform multiple of a smaller one. Chest-to-waist ratio, shoulder width and torso length all move at different rates.
Scale a pattern by one factor and those proportions distort at the ends of the range. Smaller sizes come out tight where they should be relaxed, larger sizes come out baggy where they should be fitted. That is why the same top can feel dialled-in on one person and shapeless on another, even when both chose their correct size. The fault is not the wearer; it is the single multiplier.
How is precision cutting per size different?
Precision cutting adjusts the pattern for each size individually, so the fit relationships hold across the entire range. The fitted chest stays fitted, the relaxed stomach stays relaxed, the shoulder line lands correctly and the length is right, whether you wear a small or an extra large. The design intent survives grading instead of being warped by it.
THETA applies this to its Tech T-Shirt Race Team v2, which went through 20-plus revisions to lock in fit before being cut precisely per size. The payoff is measurable in behaviour: the same fitted-chest, relaxed-stomach shape on every athlete, so the top moves the same way through overhead work and running regardless of size. As of 2026 that consistency across the range is the whole point of cutting per size rather than scaling.
Why does per-size fit matter so much in HYROX?
Count the demands and the case makes itself. The SkiErg drives 1000 metres of overhead pulling, and wall balls ask for 75 or 100 full extensions, so a top that is too tight in the chest steals your reach while one too loose at the hem flaps and rides up. Either fault becomes a distraction, and it grows over the 60–90 minutes a race takes.
The fitted-chest, relaxed-stomach shape THETA cuts for is engineered to allow full overhead range while staying clean through movement. Per-size cutting guarantees that shape holds for every athlete, not just those near the base size. The table shows how uniform grading and precision cutting diverge across the range.
| Size | Uniform grading | Precision cut per size |
|---|---|---|
| Smallest | Tight in chest, short | Fitted but full range |
| Base size | Correct | Correct |
| Largest | Baggy hem, wrong proportions | Relaxed stomach, clean line |
| Overhead reach | Varies by size | Consistent across sizes |
| Hem behaviour | Flaps at extremes | Stays put |
"A top can be perfect on the sample size and a mess two sizes up if you just scale the pattern. We cut each size on its own so the fitted chest and relaxed stomach land right on everyone. That is why the same top feels dialled-in whether you are small or extra large," says the THETA coaching team.
How does the revision process feed into cutting?
Precision cutting is only ever as good as the fit intent it preserves, and that intent is earned in the field. THETA's race team wears prototypes in real HYROX training and racing, then feeds back on anything that restricts, rides up or gets in the way, and the pattern is revised. The Tech T-Shirt v2 went through 20-plus of these fabric and fit revisions before the shape was settled.
Once that fit is locked, cutting each size to its own pattern carries the refined shape across the whole range. Skip per-size cutting and all 20-plus revisions would still degrade at the size extremes, which defeats the point of doing them. As of 2026 the combination, heavy real-world revision plus precision cutting, is how THETA keeps fit consistent for its Elite 15 and everyday athletes alike.
How do you tell if a top is cut well for your size?
Judge fit under movement, not standing still. A well-cut top holds the fitted-chest, relaxed-stomach shape and allows full overhead reach without riding up. Run through the steps below.
- Put the top on and reach fully overhead, checking it does not pull tight or lift the hem.
- Confirm it sits fitted across the chest but relaxed over the stomach.
- Do overhead reps and running strides to check it stays put rather than flapping.
- Compare the fit feel to a friend in a different size to sense whether the shape holds.
- Check the hem length is right for you, neither exposing the midriff nor bunching.
Common questions
What does precision cutting per size mean?
It means each size has its own adjusted pattern rather than being scaled uniformly from one base shape. This keeps the intended fit, such as a fitted chest and relaxed stomach, correct across the whole size range. THETA cuts its Tech T-Shirt Race Team v2 this way so the fit is consistent whether you wear a small or an extra large.
Why does the same brand's top fit differently in different sizes?
Usually because the pattern is graded uniformly, scaling every dimension by a fixed factor, which distorts proportions at the extremes since bodies do not scale evenly. That makes small sizes tight and large sizes baggy in the wrong places. Precision cutting per size adjusts each size individually to keep the fit true throughout the range.
Does fit really affect HYROX performance?
Yes. A top that is too tight in the chest restricts overhead reach on the SkiErg and wall balls, while one that is too loose flaps and rides up, and both become bigger distractions as you fatigue over 60–90 minutes. A well-cut, fitted-chest, relaxed-stomach top moves with you and stays out of the way, which is why THETA cuts per size.
What is the fitted-chest, relaxed-stomach fit?
It is a cut that sits close across the chest for a clean, non-clinging shape while staying relaxed over the stomach for comfort and full breathing under effort. THETA builds its Tech and Core tops to this shape and cuts each size to preserve it. It balances a performance silhouette with the freedom a hybrid race demands.
How many revisions does a well-fitted top take?
There is no fixed number, but serious refinement takes many iterations of real-world wear and feedback. THETA's Tech T-Shirt Race Team v2 went through 20-plus fabric and fit revisions, tested by the Elite 15 in real race environments, before the fit was locked and cut per size. That process is what makes the final fit consistent.
Should I size up if a performance top feels fitted?
Not automatically. A performance top is meant to sit fitted across the chest, so a snug chest with full overhead range and a relaxed stomach is the intended fit, not a reason to size up. Size up only if it genuinely restricts reach or breathing. Test overhead movement before deciding, since a precision-cut top should allow full range in your true size.
Sources
- Established garment-construction principles: pattern grading, size-specific cutting and fit consistency
- HYROX official race format, station list and rep standards (hyrox.com)
- THETA coaching data, 2024–2026 (fit revision and race-team feedback across seasons)
Get a fit that holds at your size. THETA's Tech T-Shirt v2 is precision cut per size after 20+ revisions, tested by the Elite 15 for full overhead range. Shop THETA performance kit.