Low-liquor jet dyeing
Fenalt manages wet processing using low-liquor-ratio jet dyeing machines to ensure complete dye penetration without degrading fiber strength.
Managed heavyweight jersey production
Custom Heavyweight Cotton T-Shirt Manufacturing: Technical Specifications & Managed Production Guide
Fenalt operates as a fully managed apparel manufacturing and sourcing solution for custom heavyweight cotton T-shirts from 220 GSM to 300+ GSM.
The service translates tech packs into finished garments through managed knitting, reactive dyeing, pattern engineering, precision cutting, and assembly rather than acting as a directory or agent list.
Direct answer
Managed heavyweight T-shirt production
Fenalt coordinates the complete technical lifecycle: translating tech packs into finished garments through managed knitting, reactive dyeing, pattern engineering, precision cutting, and assembly.
MOQ
50 pieces per style
Sampling
10–15 days for production, plus 3–5 days for shipping
Bulk
15–20 days from pre-production sample sign-off to export dispatch
POM
Standard industry tolerances across all points of measure
Inspection
ANSI/ASQ Z1.4 Level II with AQL 2.5
Incoterms
DAP for small-batch courier; FOB designated export port for bulk sea freight
Technical workflow
A controlled route from POM to dispatch
Each stage in the source workflow protects a distinct variable in the finished heavyweight knit.
- 01
Tech Pack & POM Specification
Translate the approved tech pack, points of measure, and production requirements into the material and garment brief.
- 02
Yarn Selection & Circular Knitting
Select low-torque, long-staple compact ring-spun yarn and knit the required 220–300 GSM structure.
- 03
Reactive Dyeing & Stenter Compacting
Set shade, width, GSM, and dimensional stability through low-liquor reactive dyeing, stenter framing, and mechanical compacting.
- 04
Precision Assembly & Seam Structure
Cut and assemble the stabilized jersey with controlled seams, neck ribbing, and approved POM tolerances.
- 05
ANSI/ASQ Z1.4 AQL 2.5 Inspection
Inspect construction and measurements under Level II sampling with an AQL 2.5 acceptance threshold.
- 06
DAP / FOB Export Dispatch
Release approved goods for small-batch DAP courier shipment or bulk FOB sea-freight planning.
Heavyweight fabric construction matrix
Three technical weight profiles
Yarn type, knit structure, stabilization, and ribbing are specified together so the final garment retains its intended body and fit.
| Property | Standard Streetwear (220 GSM) | Heavyweight Premium (260 GSM) | Ultra-Heavyweight (300 GSM) |
|---|---|---|---|
| Yarn Type | 20s/1 Combed Compact Ring-Spun | 16s/1 Combed Compact Ring-Spun | 12s/1 or 16s/2 Combed Ring-Spun |
| Knit Structure | Single Jersey (24 Gauge) | Single Jersey (20/22 Gauge) | Fine Interlock / Heavy Jersey |
| Shrinkage Control | Mechanical Compacting (<5%) | Stenter + Mechanical (<3%) | Pre-shrunk Stenter (<3%) |
| Torque / Skewness | < 3% Skew Rate | < 2% Skew Rate | < 2% Skew Rate |
| Stitch Construction | ISO 4915-401 / 504 | ISO 4915-401 / 504 | ISO 4915-514 / 607 Flatseam |
| Neck Ribbing Spec | 1x1 Cotton/Spandex (300 GSM) | 1x1 Heavy Rib (350 GSM) | 2x2 Dense Rib (400 GSM) |
Category engineering
Yarn selection and fabric stabilization
Heavyweight cotton T-shirts demand low-torque, long-staple combed compact ring-spun yarn.
Stability targets
220 GSM: mechanical compacting below 5% shrinkage and below 3% skew.
260 GSM: stenter plus mechanical compacting below 3% shrinkage and below 2% skew.
300 GSM: pre-shrunk stenter below 3% shrinkage and below 2% skew.
Standard carded yarns exhibit high hairiness and uneven fiber distribution, leading to surface pilling and fabric spirality after washing. Compact spinning compresses the fiber stream during twisting, yielding a smooth yarn structure with superior tensile strength.
Torque reduction
Yarns are steam-conditioned to set twist energy before circular knitting, preventing finished-garment side seams from spiraling forward.
Compacting and stenter framing
Open-width stenter framing sets final fabric width and GSM, followed by felt-belt mechanical compacting. The process compresses knit loops and stabilizes post-wash shrinkage.
Wet processing
Dyeing kinetics and enzyme finishing
Dense heavyweight fabric absorbs more dye liquor per metre, so wet processing must achieve penetration without degrading fiber strength.
Reactive dye chemistry
Bifunctional reactive dyes bond covalently with cellulose, achieving Grade 4–5 dry crocking and Grade 4 wash fastness under ISO 105-C06.
Neutral cellulase enzyme finish
Bio-washing removes surface micro-fibrils, helping prevent initial pilling while maintaining fabric density and hand-feel.
Shade, fastness, shrinkage, torque, and construction evidence remain tied to the approved specification.
Commercial planning
Production timing and delivery
- Minimum Order Quantity (MOQ)
- 50 pieces per style.
- Sampling Lead Time
- 10–15 days for production, plus 3–5 days for shipping.
- Bulk Production Turnaround
- 15–20 days from pre-production sample sign-off to export dispatch.
- Dimensional Tolerances
- Standard industry tolerances applied across all points of measure (POM).
- Incoterms & Delivery
- DAP for small-batch courier shipments; FOB designated port of export for bulk sea freight.
Questions and answers
Heavyweight T-shirt production FAQs
What does the managed heavyweight T-shirt service include?
Fenalt coordinates tech packs, yarn selection, circular knitting, reactive dyeing, pattern engineering, precision cutting, assembly, inspection, and DAP or FOB export planning.
What quality standard applies before shipping?
The source specifies ANSI/ASQ Z1.4 Level II with an AQL 2.5 acceptance threshold and standard industry tolerances across all points of measure.
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