What Is GSM in Fabric? Weights by Sport

01What is GSM in fabric?

GSM is grams per square meter, the weight of the fabric. As a rough guide, under 150 GSM is light, 150–220 is mid weight, 220–300 is heavy and anything above 300 is fleece or outerwear territory.

GSM alone does not describe a fabric. A 140 GSM micro-mesh breathes far more than a 140 GSM interlock, and a 200 GSM poly-elastane feels nothing like a 200 GSM double knit. Always specify composition, construction and GSM together, for example 100% polyester bird-eye mesh, 140 GSM.

The ranges in this guide are typical industry figures. The actual weight of a given fabric comes from the mill sheet for that lot, and mill weights carry a small tolerance, so agree the target and the acceptable range in writing.

02How fabric GSM is measured

Mills and inspectors measure fabric GSM with a round cutter that punches a disc of exactly 100 square centimeters. The disc is weighed on a precision scale and the reading is multiplied by 100 to give grams per square meter. Several discs are cut across the width of the roll, because weight can vary from the edge to the center.

Measure the fabric conditioned and relaxed, not straight off a hot press or a humid store room, since moisture adds weight. On a finished garment, cut the disc from a single layer away from seams and prints. Printing and coating add weight, so a sublimated panel can weigh slightly more than the same fabric blank.

GSM is a metric unit. Some buyers quote ounces per square yard instead; 1 oz per square yard is about 34 GSM, so a 5 oz fabric is roughly 170 GSM.

03Common teamwear knits

Most game and training wear is knitted polyester. These are the constructions you will see most often on a spec sheet.

Micro-mesh, 130–170 GSM: small, even holes; soccer, basketball, lacrosse, reversibles.
Bird-eye mesh, 120–180 GSM: textured, breathable; training tops, baseball and softball panels.
Pinhole and pro-mesh, 140–200 GSM: larger holes for ventilation; football and basketball side panels.
Interlock and micro-interlock, 140–200 GSM: smooth face with the sharpest sublimation detail; soccer, volleyball, esports.
Pique, 160–220 GSM: polos and coach wear.
Pro double knit, 200–260 GSM: baseball and softball jerseys and pants, football pants with added spandex.
Poly-elastane compression, 180–320 GSM with 8–20% elastane: baselayers, sliding shorts, volleyball shorts.
Fleece and French terry, 220–400 GSM: hoodies, joggers and warm-ups.

04Fabric by sport

These are sensible defaults. Your market, climate and price point may push you lighter or heavier.

Soccer: interlock or micro-mesh at 130–160 GSM; jacquard knits for a textured club look.
Basketball: micro-mesh or dazzle for game wear; reversible mesh for practice.
Baseball and softball: pro double knit at 200–260 GSM, bird-eye mesh panels, or sublimated interlock.
Football: pro-mesh or dazzle bodies with stretch sleeves; stretch double knit pants.
Volleyball: poly-elastane at 160–200 GSM for fitted jerseys; spandex for shorts.
Ice hockey: airknit at 150–220 GSM or heavier game knit at 220–300 GSM, with mesh zones.
Rugby: modern poly-elastane at 200–280 GSM, or classic cotton-poly at 330–350 GSM.
Wrestling: nylon-elastane or poly-spandex singlet fabric at 200–260 GSM.

05Sublimation needs polyester

Sublimation dyes polyester fibers, so the fabric must be polyester to take a full-dye print. 100% polyester gives the brightest color. Blends down to about 65% polyester will print, but color looks duller because the other fibers stay undyed.

Cotton, bamboo viscose and merino do not sublimate. If you want a soft natural-fiber feel, plan on screen print, DTF or embroidery instead. Recycled polyester (rPET) sublimates the same way as virgin polyester; if you want to market it as recycled, ask for the mill's chain-of-custody paperwork for that lot.

Sublimation also needs a white or very light base. Smooth interlock holds the finest detail. Open mesh prints well, but small text can break up over the holes. Our page on sublimated jerseys shows which of our fabrics print best.

06Finishes and the claims they allow

Finishes are applied at the mill and change how a fabric performs. Common options for teamwear include moisture wicking, quick dry, anti-odor, UPF sun protection, water-repellent DWR, cool-touch and anti-pilling. Brushed or peached finishes soften the hand on training and fanwear.

Here is the honest caveat. A finish on the fabric and a claim on your hangtag are two different things. UPF ratings need a lab test such as AATCC 183. Anti-microbial claims are regulated in the EU and the US. Several US states now restrict PFAS in apparel, so specify PFAS-free DWR for water repellency. Only print a claim you have a test report or mill certificate to support.

07Custom fabric development through partner mills

Our knitting and dyeing are done by partner mills, and everything from pattern to packing happens in house. That setup lets us develop a fabric to your requirement rather than limiting you to stock articles.

Development can cover a custom GSM, a knit structure such as a club jacquard or engineered mesh zones, a yarn choice such as rPET, and dyeing to your PMS references with lab dips for approval. Each project needs research with the mill first, so there is no fixed published minimum. Contact us with the target and we come back with what is possible, the trial steps and the timing.

08Swatches and fabric approval

Swatch books and color books are available, so you can handle fabrics and compare colors before you quote your own customer. Check hand, stretch and recovery, and on compression fabric, how opaque it stays when stretched. The activewear fabric library lists the cloths in each book with composition and GSM.

Then approve the fabric on a real garment. You can order one of our clothing samples at the 12–50 tier price plus decoration, credited to your bulk order. Remember that catalog prices for our blank jerseys and other styles are for blank or color-blocked garments; decoration is quoted per design.

Q&AQuestions buyers ask

Is a higher GSM better quality?

Not by itself. Higher GSM means a heavier fabric, which suits fleece, outerwear and hard-wearing baseball pants, but makes a game jersey hotter and slower to dry. Quality comes from the yarn, knit and finish as much as the weight. Pick the GSM that suits the sport and climate, then judge quality on a swatch.

What GSM is a good hoodie?

Most team hoodies use brushed fleece between about 280 and 350 GSM. Around 280 GSM is a mid-weight layer for training and travel; 320 to 350 GSM feels heavier and warmer for winter fanwear. French terry at 220 to 320 GSM is a lighter option that pills less. Compare swatches before you decide.

What GSM should a sublimated soccer jersey be?

Most sublimated soccer jerseys use 100% polyester interlock or micro-mesh at about 130–160 GSM. Interlock gives the sharpest print detail; micro-mesh breathes more in hot climates. Heavier fabric feels more substantial on the hanger but runs hotter on the field. Request swatches of both and compare them with your customer's climate and playing level in mind.

Can recycled polyester be sublimated?

Yes. Recycled polyester sublimates the same way as virgin polyester and gives the same color range. The difference is paperwork. If you plan to label or market the garment as recycled, you need the mill's chain-of-custody documents for the fabric lot. Tell us at quote stage so the right fabric and documents are sourced from the start.

Can you match a fabric our customer already uses?

Often, yes. Send a physical sample with any known composition and weight, and we work with our partner mills to match the construction, GSM and color. Because each development needs research with the mill first, there is no fixed published minimum. We confirm what is possible, the trial steps and the timing before you commit.

What is GSM in fabric? Teamwear weights, sport by sport