B2B Manufacturing
Heavyweight Sweatpant Manufacturer
Dense 450-550 gsm loopback fleece with a substantial, structured drape, the premium-weight sweatpant that reads as quality the moment it’s handled.
Fabric
450-550gsm loopback.
Garment wt
~650 g.
Seams
Reinforced, gusseted.
Finish
Garment-washed.
The Gibben Clothing Sourcing Blueprint
The weight is the whole pitch
A heavyweight sweatpant sells on hand feel before anyone reads a label. At 450-550 gsm, the fabric is the product, which means it has to be sourced at 450-550 gsm and hold that weight without the seams giving out or the pants twisting after a wash. We use loopback fleece, reinforce and gusset the seams, and garment-wash for a broken-in drape and to pre-shrink. This is where cheap sweatpants fall apart: heavy fabric on light construction fails fast.
This blueprint covers the build sheet, why GSM and garment weight are the real spec, loopback vs brushed-back, private-label options, sampling, cost drivers, MOQ and compliance, and sizing on the heavier block.
Buyer tip: quote by garment weight in grams, not just GSM. Two 500 gsm fabrics can finish 80 g apart depending on width and shrinkage. Grams is the number that reaches the customer.
Technical Specification
Build sheet
Heavy fabric demands heavy construction every line here is about surviving weight and washing.
Fabric
450–550gsm loopback
Waist
Elastic + drawcord
Seams
Reinforced, gusseted
Pre-shrunk
Garment-washed
Silhouette
Regular / relaxed
Cuff
Deep ribbed or open
Pockets
Side; back optional
Drawcord
Heavy, custom tips
Fabric & Construction
Loopback is why it drapes
Loopback (French terry’s heavier cousin) gives that dense, structured fall you can’t fake with a brushed back. At the same weight, the loops add mass and recovery. 450gsm is the accessible premium; 500-550gsm is the flagship, heirloom-feel weight. Cotton-rich blends keep the hand soft; a touch of poly stabilizes heavy loopback against twisting. Garment washing is non-negotiable at this weight; it pre-shrinks and softens so the customer’s first wash doesn’t change the fit.
Branding & Private Label
Make it yours, end to end
Heavyweight fleece is a canvas 3D puff embroidery and high-density prints sit beautifully on the dense surface. Add a woven waistband label, heavy metal-tipped drawcords, and pigment or enzyme washes for a lived-in, elevated finish. On a premium-weight pant, the wash and the cord tips do as much for perceived value as any logo.
Development & Sampling
From tech pack to bulk
The same seven-step path runs whether you order one silhouette or all four, and because they share a waist, samples for the whole family move together.
01
Send your tech pack, sketch, or a reference pair you like; if there’s no tech pack, we reverse-engineer the pattern from the sample.
02
We will quote within 24 hours based on your fabric weight, decoration, and target Incoterm and then confirm the spec in writing.
03
The proto sample was cut and shipped (7–10 days), so you can check the block, rise, and proportion on a real body rather than a flat drawing.
04
Fit + fabric sign-off: we grade the full size run to your measurement chart and match lab-dips to your Pantone colors.
05
Pre-production (PP) sample locks every seam, trim, and label; nothing enters bulk until you approve it.
06
Bulk cut, sewn, and finished (4–6 weeks), then QC inspected before folding, polybagging, and cartoning.
07
Ship FOB or DDP with your main labels, care labels, hangtags, and packaging already on the garment.
What Moves The Price
Cost drivers, in plain terms
On a heavyweight, fabric dominates the cost more than any other bottom you’re literally buying grams.
MOQ, Logistics & Compliance
The commercial detail
MOQ is from 50 pieces per colorway per silhouette. Ordering multiple silhouettes in one dye lot can share setup costs, and we’ll structure the quote around it.
| Quantity / style | Indicative unit price |
|---|---|
| 100–198 | Base |
| 200–598 | −1% |
| 600–998 | −2% |
| 1,000–1,998 | −3% |
| 2,000+ | −4% |
Exact pricing is issued on the quote against your fabric, decoration, and Incoterm.
Size Chart (cm)
Regular fit
| Size | Waist | Hip | Inseam |
|---|---|---|---|
| S | 74 | 102 | 74 |
| M | 80 | 108 | 76 |
| L | 86 | 114 | 78 |
| XL | 92 | 120 | 80 |
Cut with a touch more ease to carry the heavier fabric. Waist relaxed; garment-washed measurements graded to your chart.
Why Source This With Us
Built by people on the floor
Anyone can buy 500gsm fabric; the skill is sewing it so it survives. We reinforce and gusset the seams and garment-wash every run so the pant that reads “premium” in the buyer’s hand still fits after ten washes.
True 450–550gsm loopback
Garment-washed, pre-shrunk
Consistent grams run to run
Reinforced + gusseted seams
Washed sample before bulk
Direct Sialkot production
FAQ: Heavyweight sweatpants
Buyer questions
Can you actually hit 550gsm consistently?
Yes, we source to spec and check finished garment weight in grams on the sample and in bulk quality control. We’ll confirm the exact achievable weight for your fabric and color before you commit.
Loopback or brushed-back at this weight?
Loopback: It gives the dense, structured drape a heavyweight that is worth it. Brushed-back at 500 gsm feels softer but flatter and can pill faster. We’ll send both if you want to feel the difference.
Why does garment-washing matter so much here?
Heavy fleece shrinks and can twist. Washing before it ships pre-shrinks and relaxes the fabric so the customer’s first wash doesn’t change the fit and it gives that broken-in premium hand.
Will 3D embroidery hold on heavy fleece?
Yes, dense loopback is one of the best bases for 3D puff and high-density work. We stabilize the back so it stays crisp through washing.
Do you make a matching heavyweight hoodie?
Yes, dense loopback is one of the best bases for 3D puff and high-density work. We stabilize the back so it stays crisp through washing.
What’s the MOQ per colorway?
From 50 pieces per colorway, per design.
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