GSM is fabric weight per square metre, not a complete warmth or quality score. Pair it with construction, fibre content, garment dimensions and the care label.
Translate the fabric description into a real comparison
Look for fibre percentages, knit construction and the inside surface on the current listing. A loopback French terry interior and a brushed, fuzzy interior are different textures. Nike describes one lightweight French terry hoodie as having a breathable loopback finish, while its wider fleece range includes several weights and fits. The name “fleece” alone does not identify the composition or the feel of another seller’s hoodie.
Ask whether the hood is lined, whether the body is a pullover or full zip, and what the cuffs and hem are made from. Those details affect how the garment layers and how it looks after repeated wear. A front-only thumbnail rarely answers them.
Apply these checks to the products in UIDBuy Hoodies & Sweatshirts Spreadsheet.
Use GSM as one measurement, not a verdict
GSM means grams per square metre of fabric. Nike gives examples of 280 GSM for a lightweight range and 320 GSM for a medium-weight range within its own collection. That illustrates how the measure can distinguish fabrics, but it does not create a universal “best GSM” for every hoodie.
Two garments with the same GSM may use different fibres, brushing, knit structure, lining and cuts. A heavier fabric may feel more substantial, yet warmth and comfort also depend on air spaces, fit and what you wear beneath it. If a listing says only “heavyweight” without a number, treat the exact fabric weight as unknown rather than guessing it from a photograph.
| Claim on a listing | What it may indicate | What remains to check |
|---|---|---|
| GSM number | Fabric mass per square metre | Fibre blend, construction and garment fit |
| French terry | A loopback-style interior | Actual composition and thickness |
| Brushed fleece | A raised soft inside surface | Pilling, care and fibre content |
| Oversized fit | Intended loose silhouette | Actual chest, length and sleeve measures |
Compare garment measurements rather than letters
Nike’s size chart explicitly labels its chest, waist and hip values as body measurements. A seller’s hoodie chart may instead show the finished garment. Measure a hoodie you like laid flat: chest width under the arms, body length, shoulder width and sleeve length. Check whether the listing uses the same starting and ending points.
For a roomy fit, consider the space you need over a T-shirt and under a jacket. For a cropped or boxy cut, the body length and shoulder width may matter more than the letter size. If a listing provides only S/M/L, ask for the selected size’s garment measurements before assuming it matches a familiar brand.
Know what warehouse photos can reveal
A front and back view can help verify colour, print placement, pocket shape and whether the selected garment matches the listing. Detail photos can show the inner surface, seam finishing, ribbing, zipper or drawcord. A clear size and care-label image helps identify the received option and its stated composition.
Photos cannot establish a reliable GSM figure, predict shrinkage or prove that a soft-looking surface will remain unchanged after washing. A QC badge means images are associated with the product; it is not a fabric test or an authenticity guarantee.
Suppose two hoodies are both marked size L. One listing gives a 62 cm flat chest and 68 cm body length; the other gives no garment measurements but says “oversized”. If those dimensions are important to you, the first is easier to compare with a hoodie you own. Ask the second seller for numbers instead of equating “oversized” with a known fit.
Check care before the first wash
Patagonia explains that pilling comes from surface fibres and friction, including wear and laundering. It recommends checking the garment care label and turning fleece inside out before washing to reduce abrasion on the outside. This can lower avoidable wear, but it cannot guarantee a pill-free garment.
Use the received item’s own label for wash and drying instructions, especially when a hoodie combines body fabric, ribbing, printing and trims. If the listing gives no care information, keep that uncertainty in mind before choosing a pale colour or a surface finish that you expect to wear frequently.
The most useful shortlist is the one with a confirmed option, clear measurements, stated fabric composition and care instructions. A catchy weight label or studio photo is a starting clue, not the full product specification.
Explore this point further in How to Read Clothing Care Symbols Before Buying.
References
UIDBuy Hoodies & Sweatshirts Spreadsheet
Hoodies & Sweatshirts: compare hoodie and sweatshirt cuts, fabric details and measurements and snapshot prices, then verify the selected option on the current listing.