A practical weight guide
| Weight class | Approximate GSM | Typical use | Notes |
|---|---|---|---|
| Light | 150–220 | Trail running, warm-weather hiking, layering | Often unlaminated or with a light grid backer; fast drying and very breathable |
| Mid | 220–320 | All-round hiking, climbing, ski touring, everyday jackets | Bonded with a micro-fleece or grid backer; balance of warmth and stretch |
| Heavy | 320+ | Cold-weather and winter jackets, ski and work outerwear | Thicker fleece backer; warmer and heavier; consider a membrane for wet snow |
Ranges are industry-typical orientation for sourcing conversations, not a standard. Actual fabrics vary by supplier and construction; GSM is confirmed on the fabric spec sheet.
Beyond weight
- Backer type: micro-fleece for warmth, grid fleece for warmth with lower weight and better breathability, mesh or tricot for a smooth interior
- Stretch: mechanical stretch from yarn and weave, or elastane for four-way stretch; more stretch improves mobility but can reduce shape retention
- Wind resistance: set by weave density and optional membranes; specify the test method (air permeability) if the claim matters
- DWR: water repellency is a surface finish. Specify the test (such as a spray rating) and the wash durability needed
- Face finish: smooth, matte, ripstop or textured; affects abrasion and look
How to choose
- Name the use and the climate range
- Choose the weight class, then the backer type
- Decide whether the jacket needs a membrane (see waterproof softshell jackets)
- Confirm stretch, wind and DWR requirements with test methods
- Check minimums, lead time and colour options before you lock the palette
Our softshell jacket program and bonded fleece softshell jackets page show how these choices turn into styles.