Heavyweight Hoodie Manufacturing: 380 GSM and Up

A heavyweight hoodie is not a mid-weight hoodie made thicker. Above roughly 380 GSM the fabric changes what the garment can carry: the body holds a boxy silhouette instead of collapsing, a chest crest sits on a surface that does not move under it, and the seams have to be built for a cloth that weighs half as much again per square metre. Our hoodie programmes run from 240 to 550 GSM, and the work described on this page is the top of that range. The minimum is 100 pieces per style per colour with sizes mixed inside a colour, sampling takes 3–7 days from a confirmed design, and bulk runs 15–25 days after the sample is approved and the deposit is received.

Where Heavyweight Starts, and What Each Band Is For

Weight is quoted in grams per square metre, and the number on its own says less than the band it sits in. The table below is our own range rather than an industry scale, because the same 400 GSM cloth can feel like two different fabrics depending on whether it is brushed, loop-back or compact-spun.

Two decisions follow from the band rather than from a single number. The rib has to be chosen with the body rather than after it, because a heavy body on a light rib hangs from the wrong point and the hem flares. And the fit block has to be settled at the same time as the weight, because a pattern drafted for 300 GSM pulled up to 450 GSM closes the armhole and shortens the sleeve.

Brushed Fleece, Loop-back Fleece or French Terry at Heavy Weight

At heavy weights the surface finish matters as much as the number. Brushed fleece is loop-back cloth with the inside brushed, which traps air and produces the soft, warm interior most heavy hoodies are known for. Loop-back fleece keeps the loops unbrushed: same construction, firmer hand, less loft. French terry is knitted with a smooth face and a terry back, and at a comparable weight it drapes more and feels cooler against the skin.

The practical difference shows up in three places. A brushed interior sheds slightly on the cutting table, so panels are cleaned before decoration. A loop-back face takes a screen print with a cleaner edge than a brushed one, because there is no pile to sit under the ink. And a heavy French terry reads more like a sweatshirt than a hoodie when it is worn, which is usually a fit decision rather than a fabric one. The comparison between the two families is set out in more detail under fleece versus French terry.

What the Weight Does to Construction

A 450 GSM body is roughly half again the mass of a 300 GSM one, and the seams carry that. Four-thread overlock on the body and side seams is run at a stitch density that holds heavyweight fleece through repeated washing rather than opening at the seam allowance. Shoulder tape goes in because a knit shoulder carries the whole weight of the garment; without it the neckline sits wide after a few washes, which is the most common failure in a heavy hoodie. The neck rib is coverstitched under a controlled stretch ratio so it neither ripples nor stands away from the body, and the pocket corners are bar-tacked because a heavy pocket pulls at the two points it is attached by.

Those four details are standard on our lines and are described on the hoodie manufacturing page, together with the fabric, hardware and finishing options that sit around them. What changes at the top of the weight range is the set-up rather than the list: needles, feed timing and the machine settings are set for the cloth, and a style that moves from 380 to 500 GSM is re-set rather than run on the same settings.

Shrinkage, Hand-feel and the Sealed Sample

Heavier cloth moves more in the first wash, so the allowance is measured rather than assumed. Every new fabric lot is wash-tested and the result is fed into the pattern as an allowance, and the bulk fabric is steam pre-shrunk before cutting. The garment you receive is measured to your size chart after washing, not before, which is why the size set is checked on a washed sample rather than on the greige panel.

Hand-feel is settled the same way. Two fabrics at the same weight from different mills can differ in softness, loft and how the surface reads under light, and a photograph does not carry that difference. Fabric options are prepared as physical swatches and couriered before a style is confirmed, so the decision is made with your hands rather than from a specification sheet. Where a garment-dyed or washed finish is part of the programme, the finish is applied to the made-up garment and the sealed sample carries the final measurements.

Oversized, Boxy and Drop-shoulder Fits

Heavyweight hoodies are usually bought for a silhouette, and a silhouette is a pattern decision rather than a size decision. An oversized build widens the body, drops the shoulder seam and extends the sleeve, and each of those three moves changes the others: drop the shoulder without extending the sleeve and the cuff sits above the wrist; widen the body without adjusting the armhole and the garment hangs from the chest instead of the shoulder.

Extended sizing follows the same logic at the top of the range. Grading beyond the standard set is done on the pattern rather than by scaling a finished measurement, and at heavy weights the grade has to hold the fabric’s own weight in the longer lengths. How that works on extended sizes is set out under plus size grading and fit. A size set is cut in the actual fabric before bulk, because a pattern that is right on paper at 300 GSM is not automatically right at 480.

Decoration on a Heavy Surface

A heavy hoodie is the easiest garment in our range to decorate and the one where a wrong method shows most. Embroidery sits well because the cloth does not move under the stitch area, so a chest crest holds its shape and a 3D puff mark keeps its height. Chenille and appliqué also work at this weight, since the panel can carry the extra thickness without puckering at the border.

Printing needs the opposite adjustment. A heavy brushed face takes a heavier ink deposit than a light jersey, and a plastisol print that is right on a 160 GSM tee looks flat and thin on 450 GSM fleece. Curing is set per fabric rather than per machine, and the decorated panel is tested for wash, rub and stretch before the run rather than blank fabric being tested in its place. Methods, artwork requirements and placement are covered under embroidery and printing, and the print is applied at the cut-piece stage while the panels are still flat.

Minimums, Sampling and the Bulk Window

Heavyweight is not a premium tier with its own minimum. It runs inside the standard 100 pieces per style per colour, with sizes mixed inside a colour, and only a bonded or seam-sealed build changes the count, at 200. Sampling takes 3–7 days from a confirmed design; sampling is charged and the charge is credited against a first order of 300 pieces on that style. Bulk runs 15–25 days after the sample is approved and the deposit is received.

The sampling stage carries more weight on this product than on a light one. The first sample is judged as a garment — silhouette, fabric weight, construction — and the second is where neck rib width, cuff tightness, hem depth and how the decoration sits on the panel are settled. The second sample stays with us as the sealed reference standard, and bulk is measured against it at inspection to AQL 2.5, with in-line checks during the run. The inspection process itself is described under quality control.

What to Send for a Heavyweight Quote

Five things make the difference between a price and an estimate. The weight band and the finish, because 420 GSM brushed and 420 GSM loop-back are not the same cost. The fit block, including shoulder drop and body length, plus the size set you sell. The fabric composition if you have one, and whether a blend is acceptable if you do not. The decoration method, placement and colour count. And the quantity per style and colour, with the delivery window you are working to.

Send those and the quote comes back with the fabric options prepared as swatches, so the weight is decided on the cloth rather than on the number. A weight in ounces can be converted with the fabric weight calculator if your side and our side are using different units, a 100-piece order shows how a first run is structured, and the sampling timeline sets out what happens between a confirmed design and a sample in your hands. Quotes and fabric options start from the contact page.

Frequently asked questions

What is the heaviest hoodie you can make?

Our hoodie programmes run from 240 to 550 GSM, and heavyweight work sits at the top of that range. The ceiling is set by the fabric available rather than by the sewing floor, so a weight above the range is a conversation about cloth supply for that specific style rather than a standard option. Send the weight you have in mind with the finish, and the fabric options come back as swatches before anything is quoted.

Is 400 GSM heavy enough for a winter hoodie?

For most retail programmes, yes, and the band rather than the single number is what decides it. A 400 GSM brushed fleece carries a warm interior and holds a boxy shape, which is what most winter ranges are buying. A 400 GSM French terry at the same weight reads cooler and drapes more, so it behaves like a heavy sweatshirt rather than a winter hoodie. The finish is confirmed on a swatch before the style is set.

Does a heavier fabric cost more?

Weight is one input rather than the whole line. Cloth cost rises with weight, but a compact-spun yarn at a lower weight can cost more than a carded yarn at a higher one, and the finish — brushed, loop-back, garment-dyed — moves the price again. Construction and decoration sit beside it: a heavier body takes a heavier seam set-up and a heavier ink deposit. The full breakdown of what moves a unit price is set out under what drives the unit price.

Will a heavy hoodie shrink?

It moves in the first wash, and the allowance is measured rather than assumed. Every new lot is wash-tested and the result is fed into the pattern, and the bulk fabric is steam pre-shrunk before cutting. The garment is measured to your size chart after washing, not before, and the size set is checked on a washed sample. The sealed sample you approve is the reference the bulk run is measured against, so the shrinkage you sign off is the shrinkage you receive.

Can you do oversized fits in heavy fabric?

Yes, and the fit is drafted rather than scaled. An oversized build changes the body width, the shoulder drop and the sleeve length together, because moving one without the others puts the cuff or the armhole in the wrong place. At heavy weights the grade also has to hold the weight of the fabric itself in the longer lengths. A size set is cut in the actual fabric before bulk so the silhouette is confirmed on the cloth you are buying.