Loop-Back vs Brushed Fleece: What's the Difference and When to Use Each
Loop-back and brushed fleece are not two different fabrics. They are two states of the same base cloth. Every brushed fleece fabric starts life as loop-back French terry. The difference appears at the finishing stage, when the reverse-side loops are either left intact or run through a raising machine. That single process determines how the fabric insulates, how it washes, how it holds its shape, and how it ages over time. Here's a detailed look at the mechanics.
How the Reverse Side of Loop-Back French Terry Is Constructed
On a circular knitting machine, French terry is formed from two or three yarn systems. The ground yarns create the smooth face: even columns of stitches that stretch and recover. The loop yarn is drawn between the ground stitches and lies on the reverse side as free, uncut arcs. Those arcs are the "loops" you see on the back of the fabric.
In heavyweight French terry (loop-back), the third yarn adds an extra layer of arcs. The loops are larger and denser than in standard two-yarn French terry. This is why heavyweight loop-back French terry, at the same fiber composition, is noticeably thicker and heavier: 310–400 GSM compared to 180–230 GSM for the two-yarn version.
The key point: in loop-back French terry, the loop yarn retains its integrity. Each arc remains a closed loop, anchored into the ground on both sides. This gives the fabric mechanical strength and dimensional stability. The loops act like micro-springs, returning the fabric to its original shape after stretching.
What Happens During Raising (Brushing)
Brushed fleece is not about adding material — it's about breaking down structure. The fabric is passed through a raising machine fitted with a drum carrying rows of fine wire-toothed fillet. The needles catch the reverse-side loops and pull individual fibers out of them. The closed arcs are converted into standing pile.
The process runs in multiple passes. More passes produce a denser, longer pile, but they also progressively weaken the loop yarn structure. With aggressive raising, the yarn loses a measurable amount of its original tensile strength. The fibers that have been drawn out of the loops no longer function as springs and no longer help the fabric recover its shape.
After raising, the fabric goes through cropping (to even out the pile length) and sometimes calendering (passing through heated rollers to consolidate the surface).
This is why brushed fleece fabric, at the same GSM and fiber content, behaves differently from loop-back French terry. It is not a marketing distinction or simply a matter of "softness." It is a physically different fiber structure on the reverse side.
Comparing Properties at the Same Composition and GSM
For a direct comparison, take heavyweight loop-back French terry at 330 GSM, 65% cotton / 35% polyester, and brushed fleece sweatshirt fabric at 330 GSM, 65% cotton / 35% polyester. Same mill, same composition, same weight. The only difference is the reverse-side finish.
Property
Loop-Back French Terry
Brushed Fleece
Reverse side
rows of closed loops
open, standing pile
Fabric thickness
lower at the same GSM
greater due to air trapped in pile
Thermal insulation
moderate
noticeably higher
Air permeability
higher
lower
Pilling resistance
high
lower — pile tends to pill
Shape retention
better — loops spring back
lower — pile does not recover
Shrinkage after washing
3–5%
4–6%; pile compacts with washing
Hand feel
smooth, firm
soft, velvety
Print application (DTF, screen printing)
excellent — flat, even surface
poorer — pile interferes with adhesion
Expected garment lifespan
longer
shorter with active wear
Approximate price
slightly higher wholesale
slightly lower wholesale
Brushed fleece tends to be marginally less expensive at wholesale because the raising process can mask irregularities in the knit structure. It is easier for a mill to run fabric with minor knitting imperfections and cover them with pile than to maintain the consistent, clean loop required for quality loop-back French terry. Clean loop-back fabric, particularly in compact combed cotton, demands more uniform yarn and tighter machine calibration.
Why Brushed Fleece Is Warmer
What retains heat is not the fabric itself but the air trapped within the fiber structure. In loop-back French terry, air sits inside the closed loop arcs. The volume of those air pockets is fixed by the knit geometry.
When the loops are raised, fibers escape from the arcs and occupy a larger volume. Micro-pockets of air form between them — pockets that did not exist in the loop-back structure. The total volume of trapped air in brushed fleece is appreciably greater than in loop-back French terry at the same GSM, which explains the significant difference in thermal performance at identical fabric weight.
There is a trade-off, however. The pile compacts over time through washing and wear. As it does, those micro-pockets partially collapse and thermal performance gradually declines. Loop-back French terry does not suffer this degradation: its reverse side after dozens of washes looks almost identical to how it looked after the first.
When to Choose Loop-Back French Terry
Loop-back wins wherever durability, shape retention, and a smooth surface are priorities.
Tracksuit bottoms and joggers. The smooth loop-back reverse glides against the skin and does not catch on a base layer. During active movement, the fabric wicks moisture more effectively because flat loops do not hold sweat in pile. For activewear brands and performance garments, loop-back French terry is the industry standard.
Hoodies and sweatshirts for print decoration. DTF, DTG, screen printing, sublimation — all decoration methods perform better on a flat, even surface. The reverse side also matters: loopback sweatshirt fabric deforms less under a heat press, produces sharper transfers, and holds prints longer. For branded merchandise and promotional runs, loop-back at 330 GSM is the reliable choice.
Transitional-season outerwear. Lightweight bomber jackets, anoraks, and gilets cut from dense loop-back French terry at 350–400 GSM hold a clean silhouette and do not read as loungewear. The structured appearance is harder to achieve with the bulkier, softer drape of brushed fleece.
100% cotton for sensitive skin. Loop-back at 310 GSM in 100% carded cotton presents a smooth reverse that does not irritate. For children's clothing and wearers with skin conditions, smooth loops are more comfortable than pile, which can feel prickly when damp with perspiration.
When to Choose Brushed Fleece
Brushed fleece fabric wins wherever maximum warmth at minimum weight is the priority.
Winter hoodies and sweatshirts for everyday wear. Brushed fleece at 330 GSM worn under a jacket in temperatures around 10–15°F (around -10 to -15°C) delivers immediate warmth. The pile reverse creates a "down-like" sensation the moment you put it on. Loop-back at the same temperature feels cooler for the first few minutes until body heat warms the air in the loops.
Loungewear and pajamas. Here, softness against the skin matters more than longevity. Brushed fleece robes and lounge sets in 100% cotton are tactilely superior. Garments worn gently and washed less frequently — pilling is not a critical concern.
Winter casual sportswear for outdoors. Not for gym use, but for outdoor walks: children's warm sets, adult leisure suits. The pile acts as an integrated lining and replaces an additional insulating layer.
Budget production runs. Brushed fleece typically runs 5–10% less expensive than loop-back at wholesale. For high-volume production of sweatshirts — runs of 500 to 1,000 units where the cost-per-metre is carefully tracked — the saving across total yardage is meaningful.
Pilling: The Main Drawback of Brushed Fleece
Pilling is the formation of fiber bobbles on the fabric surface. On the face of French terry, it depends on yarn quality — compact combed cotton outperforms carded cotton, which outperforms open-end (rotor-spun) cotton. On the reverse side, pilling is determined by the finishing type.
Loop-back French terry is resistant to reverse-side pilling. The fibers are locked within closed arcs and do not migrate across the surface. Even with active wear and frequent washing, the reverse of loop-back French terry stays smooth.
Brushed fleece fabric begins to pill after the first few washes. The free pile fibers tangle together and form bobbles. The higher the synthetic content, the faster and more visibly pilling develops. Brushed fleece in 100% cotton pills more slowly, but the pile is also less dense to begin with.
Pilling can be reduced with proper care: wash inside out, gentle cycle at 86–104°F (30–40°C), low spin speed. But it cannot be eliminated entirely — it is a structural characteristic of the finish.
Quick Summary: Which to Choose
Choose loop-back French terry when you need shape retention, durability, a smooth surface for print decoration, athletic functionality, or a consistently clean appearance after repeated washing.
Choose brushed fleece when you need maximum warmth, a soft hand feel, budget-friendly warm-weather construction, or garments for home and casual outdoor wear where longevity is secondary.
If your application can work equally well with either, loop-back is the more durable, dependable choice. If warmth is the primary requirement and budget is a constraint, brushed fleece is the more practical option.
Fabric Consumption and Yardage
Yardage requirements for loop-back and brushed fleece are identical at the same GSM. The raising process does not change fabric width and does not affect pattern layout. The only practical difference is loft: brushed fleece garments are physically bulkier when finished.
A standard hoodie in a size Medium requires approximately 1.5–1.7 m (1.65–1.85 yd) of fabric at 180 cm (71 in) width. A full tracksuit (hoodie plus joggers) requires 2.8–3.2 m (3.1–3.5 yd). Exact yardage depends on the pattern design and seam allowances. Use the calculator on the site for a precise estimate.
Browse the full French terry catalogue with filters by GSM, fiber content, and finish type. For a comparison of standard two-yarn French terry versus heavyweight three-yarn French terry by weight and season, see the article French Terry 2-Thread vs 3-Thread.
Frequently Asked Questions
No. Raising is carried out on an industrial raising machine fitted with wire-toothed fillet rollers. Attempting to brush fabric by hand with a clothes brush will damage the yarns unevenly and ruin the fabric.
Yes, but the result is a light brushed finish. The loop yarn in standard two-yarn French terry is finer, so the pile produced is shorter and less dense than in heavyweight three-yarn fabric. This is used for light insulation in transitional-season garments.
At the same labelled weight — for example, 330 GSM — the actual weight per square metre is the same. However, brushed fleece looks and feels thicker because of the loft of the pile. The apparent "heaviness" is a tactile effect, not a difference in actual mass.
For active children, loop-back French terry: more durable, does not pill, easier to launder. For infants and toddlers up to around age two, brushed fleece in 100% cotton: softer against delicate skin and warmer at a lower overall weight.