Single Jersey Knit: The Base Fabric of Modern Activewear
Single jersey is the most economical weft knit and the starting point for most tops, linings and lightweight bottoms.
The practical guidance below is written for buyers and product developers who need a specification that a mill can meet.
How single jersey is knitted
One set of needles forms loops in one direction, producing a fabric with a face and a back that behave differently.
The practical value shows up in returns and reviews rather than in the fabric invoice, which is why it deserves a place in the brief.
Weight and stretch ranges
Typically knitted from 120 to 220 GSM with 5 to 12 percent elastane for comfortable two-way stretch.
Fix the limits for the whole size range, not only for the middle size, as grading changes the numbers involved.
- Record settings and raw material lots for every approved production run
- Check in-process rather than relying on final inspection
- Escalate deviations the same day they appear
Edges and curling
Single jersey curls at the edges, so hems, necks and side seams need ribbing, binding or a coverstitch finish.
Plan a trial run before the main order so the settings can be validated on real production equipment.
Where it performs well
Lightweight tops, linings, sleepwear and summer activewear where softness matters more than structure.
Verify with an accredited test on production fabric rather than a development sample, and repeat the test after laundering.
- Ask for a separate price line for the requirement
- Confirm minimum quantities before committing the colourway
- Build one extra approval round into the calendar
Quality points to check
Course and wale density, spirality, GSM tolerance and shade uniformity are the usual inspection criteria.
Document what is included in the price, including testing, packing and documentation, to keep comparisons fair.
Summary
Handled early, the requirement costs little and protects the launch date; handled late, it becomes an argument about responsibility.
