Interlock (Double-Knit Polyester)

Weight	160–250 g/m²
Composition	100% polyester double-knit; cotton and elastane blends also exist.
Knit type	Interlock (double-knit) · Sport & Technical
Use class	Everyday
Stretch	Mechanical stretch
Knit	A double-knit where both faces’ loops interlock on two needle beds; identical faces (symmetric), flat, smooth.
Hand	Fuller, more stable and opaque than single jersey; both faces smooth, draping but bodied; no curling.
Typical use	Polos/tees · sport tops/joggers · fitted dresses · babywear
Strength	A double-knit that is more stable, opaque and durable than single jersey — both faces usable.
Watch for	Thicker/heavier than jersey at equal weight; not ideal for very thin summer pieces; stretch (elastane-free) is more limited than jersey. Same structure as the Interlock family.

CertificationsISO 9001ISO 14001ISO 45001OEKO-TEX STePSTANDARD 100GRS · RCS

Width, gauge, finishing options and test standards are shared on request.

Typical technical ranges

Weight tolerance	Typically ±5%; in very light (85–120 g/m²) jersey/mesh constructions may run to ±6–7% in practice. Spandex relaxation/tension affects GSM
Width	Open width (finished): typically 150–190 cm; tubular: typically 90–180 cm depending on supply form (varies with cylinder diameter/machine and final set width)
Shrinkage (wash)	After wash, length/width: typically −3% to −6%; ≤ ±3% achievable with good heat-set/compaction. Single jersey moves more than balanced interlock/rib; spandex recovery can increase length change
Color fastness	Wash 4–5; rubbing dry 4–5, wet 3–4 (deep/bright & migration-prone shades may drop to 2–3); light 4–5; perspiration typically 4–5. Wet rub & deep/bright shades are the weakest link; reductive clear (RC) quality is decisive
Abrasion / pilling	Martindale abrasion: typically ~15,000–40,000+ cycles (tight piqué/double-knit high, light mesh/jersey lower); pilling: typically 3–4 (near 4 on smooth filament; texturized/microfiber/brushed surfaces can sit at 2–3; anti-pill finish can lift to 4)
Gauge / yarn	Machine gauge: typically E24–E32 (E36–E40 for very fine constructions); yarn: typically 50–150 denier texturized/microfilament PES. Notation is denier/filament-count (e.g. 50/72, 75/72, 100/144, 150/288) — higher filament count = lower dpf = microfilament/soft hand. Spandex variants add base PES + spandex (e.g. 20–40 denier)

These ranges are industry-TYPICAL / indicative values based on construction and fiber, not Fersan's binding QC measurements. Exact values are confirmed per order, approved sample and lot-based QC report.

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Fersan Tekstil · www.fersantekstil.com · (0212) 875 43 13