Halcyon Studio Sweden: Triathlon Programme Comfort and Fit Evaluation
Halcyon Studio is a Sweden-based brand whose triathlon programme is one of its most demanding programmes. Performance data means nothing if the garment is uncomfortable. This evaluation covers how the seamless circular knit behaves on the body during triathlon programme work.

Halcyon Studio: Seamless Circular Knit in use during swim, bike and run in a single event
Evaluation background
The programme covers trisuits, shorts and transition layers, used for swim, bike and run in a single event. The environment is transitions between water, wind and road and the requirement written into the brief was one fabric that performs wet and dry without chafe. Fabric was selected on that basis rather than on price alone.
Fabric under evaluation
| Parameter | Value |
|---|---|
| Fabric | Seamless Circular Knit |
| Composition | polyamide / elastane seamless |
| Weight | 220 GSM |
| Width | 170 cm |
| Primary function | removes side seams so contact points stop rubbing |
| Target | above 20000 abrasion cycles without yarn breakage |
| Test method | ASTM D4966 |
| Additional note | zoned structure knitted directly into the tube |
| Certification | OEKO-TEX Standard 100 |

Seamless Circular Knit close-up showing the fabric surface
Fit assessment
Size sets were fitted on live models and on a fit form. Fabric extension was measured at the stress points so the pattern could be corrected before bulk cutting.
Movement testing
Wearers performed the movements specific to swim, bike and run in a single event while panel tension was observed. No restriction was reported and recovery between movements was immediate.

Evaluation session with the Halcyon Studio team
Next-to-skin comfort
Surface friction, hand and temperature sensation were scored by the panel. The fabric scored best where one fabric that performs wet and dry without chafe, which is the priority Halcyon Studio set for this product.
Fit retention
Garments were measured after five and twenty washes. Growth stayed within tolerance, so the fit approved in sampling is the fit the customer eventually receives.

Test records and inspection notes for the Triathlon Programme
Scorecard
| Criterion | Result |
|---|---|
| Next-to-skin feel | 4.5 / 5 |
| Freedom of movement | 4.7 / 5 |
| Recovery | 4.4 / 5 |
| Fit retention | 4.6 / 5 |
| Seam comfort | 4.5 / 5 |
“The report gave us numbers we could put in front of our retail partners without any argument.” — Halcyon Studio Technical Team

Packed bulk rolls before shipment to Sweden
Verdict and recommendation
Comfort and fit were confirmed in wear, and the seamless circular knit is approved for bulk with the current pattern. For Halcyon Studio the practical next steps are to keep the current specification for the repeat, retain the shade standard, and issue ASTM D4966 results with every lot so any claim can be supported with data.