What Is Knit Fabric? Types, Properties and How to Choose

Short answer: knit fabric is made by looping yarn into interlocking stitches, rather than by interlacing two sets of yarn as woven fabric does. Because the loops can open and close, knits stretch, recover and drape — which is why T-shirts, hoodies, sweaters, leggings and socks are all knit. The most common types are single jersey, rib, interlock, French terry, fleece and pique.

This guide explains what knit fabric is, the main types, and how buyers should choose.

How Knit Fabric Is Made

Knitting forms loops of yarn that pass through one another, row after row. Two things result from this loop structure:

Most apparel knit is weft-knitted on circular or flat machines, where loops run horizontally and the fabric stretches crosswise. Warp knitting forms vertical loops and produces more stable, technical fabrics.

The Main Types of Knit Fabric

Single Jersey

The most common knit: smooth on the face, looped on the back, light and economical. Used for T-shirts, dresses and light tops. It can curl at the edges, so hems and necklines use rib or binding.

Rib Knit (1x1, 2x2)

Vertical ridges on both sides give excellent stretch and recovery. Used for cuffs, collars, waistbands and form-fitting garments.

Interlock

Two sets of needles produce a smooth face on both sides: denser, more stable and less curly than jersey. Good for premium tees and dresses.

French Terry

Loops on the back, smooth on the face. Absorbent and comfortable; used for hoodies, joggers and loungewear.

Fleece

Knitted then brushed for a soft, warm interior. Used for hoodies, sweatshirts and winter pieces.

Pique

A textured, waffle-like surface, most associated with polo shirts and sportswear.

What Knit Fabric Does Well

The loop structure gives knits clear advantages:

The trade-offs are lower dimensional stability (knits can shrink or relax) and more edge curl on lightweight structures.

How Knit Differs From Woven

How to Choose a Knit Fabric

Work through four questions:

Specify all three together — structure, fibre and GSM — because they interact.

What to Specify and Test

Conclusion

Knit fabric is yarn looped into interlocking stitches, which gives it stretch, recovery, drape and comfort — the properties that make it the backbone of T-shirts, hoodies, sweaters and accessories. Learn the main structures, choose fibre and GSM to suit the product and season, and specify all three together. Understanding knit fabric is the foundation of sourcing it well.

Key Takeaways for Buyers

Before you place the order

Wash the pre-production sample twice and measure it against your spec. Most of what goes wrong in bulk, shrinkage, pilling, shade drift, is visible at that stage and invisible at approval. It takes a week, and it is the cheapest insurance in the whole process.