What Properties Should You Look for in Softshell Fabric for Jackets?

Buying softshell fabric for jackets is not the same as buying a standard woven shell. You are balancing stretch, weather resistance, breathability, and durability in one textile. Get the balance wrong, and your garment fails in the field — or worse, on the production line. This guide breaks down the measurable properties you should verify before you place an order, from water column ratings to abrasion cycles, so you can spec softshell with confidence.

Key Takeaways

Water column rating and breathability (MVTR) are the two numbers that define softshell weather performance.
Stretch recovery above 85% prevents knee and elbow bagging over the life of the garment.
A DWR finish is not waterproofing — it is a sacrificial layer that needs reapplication.
Fabric weight between 200 and 350 gsm covers most three-season jacket applications.
Always request a physical sample and lab test report before committing to bulk production.

What You Need Before Starting

Before you evaluate softshell fabric, you need a clear specification sheet. That means knowing your end use, your target climate, and your price ceiling. A daily commuting jacket has different requirements than an alpine touring shell.

You also need access to a supplier who can provide technical data. A reputable manufacturer will share test reports for water column, breathability, and abrasion resistance. If they hesitate, walk away. For reference, the industry commonly tests against standards like ISO 811 for water resistance and ASTM E96 for moisture vapor transmission.

Finally, understand the fabric construction. Softshell is typically a multi-layer laminate: a durable outer face, a waterproof or windproof membrane or coating in the middle, and a soft brushed backer. The quality of that lamination determines how the fabric performs. If you are sourcing for urban outdoor use, look at how the fabric handles in the Urban Light Outdoor System - Daily Commuting application — that context will help you prioritize the right properties.

Step 1 — Check the Water Column Rating (Hydrostatic Head)

What to Do

Ask your supplier for the hydrostatic head value, measured in millimeters of water column (mm H₂O). This number tells you how much water pressure the fabric can withstand before leaking.

Request the test report per ISO 811 or AATCC 127.
Look for a minimum of 5,000 mm for light rain and wind protection.
For heavier downpours, spec 8,000 to 10,000 mm or higher.
Confirm whether the rating applies to the fabric as a whole or just the membrane.

Why This Matters

Softshell is not a hard shell. It is not designed to sit under a waterfall for hours. But a 5,000 mm rating handles a typical urban downpour long enough to get you to the bus stop. The membrane or coating does the heavy lifting here. A PU coating is common on budget fabrics; a TPU membrane or ePTFE film performs better. The water column rating is your first filter — if it is below 3,000 mm, you are buying a windbreaker, not a softshell. Relevant specifications and application guidance are available through Recycled Fabrics.

Common Mistakes to Avoid

Assuming DWR equals waterproof: A durable water repellent (DWR) finish makes water bead up and roll off. It does not stop water penetration under pressure. The water column rating is the real measure.
Ignoring seam sealing: A fabric with 10,000 mm water column is useless if your seams are not taped. Confirm whether the supplier offers pre-taped or seam-sealable constructions.

Step 2 — Evaluate Breathability (MVTR)

What to Do

Breathability is measured as Moisture Vapor Transmission Rate (MVTR), typically in g/m²/24h. This is how much moisture vapor passes through the fabric in a day.

Ask for MVTR data per ASTM E96 or ISO 15496.
Look for a minimum of 5,000 g/m²/24h for moderate activity.
For high-output activities like climbing or cycling, target 10,000 g/m²/24h or more.
Balance breathability against water column — you cannot max out both.

Why This Matters

Here is the trade-off: a fabric with a high water column rating often has lower breathability. That is physics. The membrane that stops water droplets also restricts vapor passage. For a commuting jacket, you might accept 5,000 mm water column and 8,000 g/m²/24h MVTR. For a ski touring shell, you need the breathability to dump heat, even if the water column drops to 8,000 mm. The right balance depends on your user's activity level.

Common Mistakes to Avoid

Chasing the highest number on both specs: No fabric wins on both. Decide which matters more for your end use.
Ignoring the backer fabric: A brushed polyester backer feels great against skin but can trap moisture. Test the whole laminate, not just the face fabric.

Step 3 — Verify Stretch and Recovery

What to Do

Softshell must move with the body. Check the fabric's stretch percentage in both warp and weft directions, and test its recovery.

Request stretch data — typically 15% to 30% in the weft direction.
Ask for recovery data — the fabric should return to at least 85% of its original dimensions after stretch.
Test the fabric on a real garment pattern, not just a flat sample.
Confirm whether the stretch comes from spandex content or mechanical stretch in the weave.

Why This Matters

A jacket that does not stretch restricts movement. A jacket that stretches but does not recover bags out at the elbows and knees. Nylon-spandex blends are the standard for this reason — the spandex provides elasticity, and the nylon provides durability. Polyester-spandex blends work too, but nylon generally offers better abrasion resistance. The recovery percentage is the number most buyers forget to check, and it is the one that determines whether the garment looks good after a season of wear.

Common Mistakes to Avoid

Only testing stretch, not recovery: A fabric can stretch 30% and stay stretched. That is a failed garment.
Ignoring the face fabric's role: A tightly woven face can restrict the stretch of the whole laminate. Test the full construction.

Step 4 — Assess Abrasion Resistance and Durability

What to Do

Ask for Martindale abrasion test results, reported in cycles. This measures how many rubs the fabric survives before showing wear.

Request Martindale data per ISO 12947 or ASTM D4966.
Look for a minimum of 20,000 cycles for a daily-use jacket.
For high-wear areas like shoulders and cuffs, consider a reinforced face fabric.
Check the fabric's tear strength — a high abrasion rating means little if the fabric rips easily.

Why This Matters

A softshell jacket takes abuse. Backpack straps rub the shoulders. Car seats wear the back. Tree branches scrape the sleeves. Abrasion resistance is your first defense. High-tenacity nylon fabrics — often 40D to 70D — perform best here. The denier number matters: a 40D face fabric is lighter but less abrasion-resistant than a 70D face. For a daily commuting jacket, you want the durability to survive a season of urban use without pilling or fraying. The Functional Fabrics category covers these options, from high-tenacity nylons to reinforced polyester blends.

Common Mistakes to Avoid

Skipping tear strength testing: Abrasion resistance and tear strength are different properties. A fabric can survive rubbing but fail when snagged.
Choosing a face fabric purely on weight: Lighter is not always better. A 40D face might save weight but fail after a few months of daily wear.

Step 5 — Check the DWR Finish and Its Durability

What to Do

The DWR finish is the first line of defense against water. It makes water bead up and roll off the face fabric. But it wears off.

Ask what type of DWR is used — C6, C8, or a PFC-free alternative.
Request the DWR durability rating — how many washes before the finish degrades.
Confirm whether the DWR can be reapplied in the field or at a laundry.
Test the fabric's water repellency per ISO 4920 or AATCC 22.

Why This Matters

A DWR finish is a sacrificial layer. It is not permanent. After 10 to 20 washes, most DWR finishes lose effectiveness. That is normal. What matters is whether the fabric's core water column rating still holds. A good softshell will still block wind and light rain even when the DWR fades. The DWR just keeps the face fabric from wetting out, which reduces breathability and adds weight. PFC-free DWR options are increasingly common and perform well, though they may require more frequent reapplication.

Common Mistakes to Avoid

Treating DWR as a permanent solution: It is not. Plan for reapplication in your care instructions.
Ignoring the environmental angle: C8 DWR is being phased out in many markets due to environmental concerns. Check your target market's regulations.

Step 6 — Evaluate Weight, Hand Feel, and Construction

What to Do

Fabric weight is measured in grams per square meter (gsm). This determines the jacket's warmth and packability.

Request the fabric weight — typically 200 to 350 gsm for softshell.
Assess the hand feel — the fabric should be soft against the skin, not scratchy.
Check the backer fabric — a brushed fleece backer adds warmth and comfort.
Confirm the lamination quality — delamination is a common failure mode.

Why This Matters

Weight is a direct trade-off. A 200 gsm softshell is light and packable but offers less warmth. A 350 gsm fabric is warmer and more durable but heavier. For a daily commuting jacket, 250 to 300 gsm is a sweet spot. The backer fabric matters too — a brushed polyester backer traps warmth and feels comfortable against a base layer. Lamination quality is critical: if the layers separate, the jacket is dead. Ask your supplier how they bond the layers and what their delamination test results show.

Common Mistakes to Avoid

Choosing weight without considering climate: A 350 gsm fabric is overkill for a mild climate and underkill for a cold one. Match the weight to your user's environment.
Ignoring the backer's breathability: A dense brushed backer can trap moisture. Test the whole laminate for breathability, not just the face.

Pro Tips for Success

Request a sample yardage, not just a swatch: A 10 cm square tells you nothing about drape, stretch, or lamination quality. Ask for a half-meter sample and sew a test garment.
Ask for the full test report, not a summary: A supplier who shares raw data is a supplier who has nothing to hide. Look for the test method, the date, and the lab name.
Consider recycled options: Many suppliers now offer Recycled Fabrics made from recycled polyester or nylon. These perform comparably to virgin materials and help you meet sustainability requirements for EU and North American markets.
Test the fabric in your actual production conditions: A fabric that sews well on a sample machine may behave differently on a production line. Run a pilot batch before committing to a full order.

Frequently Asked Questions

What is the difference between softshell and hardshell fabric?

Softshell is a stretchy, breathable, water-resistant fabric designed for active use in mild to moderate conditions. Hardshell is a non-stretch, fully waterproof laminate designed for severe weather. Softshell prioritizes breathability and movement; hardshell prioritizes waterproofing. Choose softshell for daily commuting and high-output activities, hardshell for sustained rain and snow.

How many washes does a DWR finish last?

Most DWR finishes last 10 to 20 washes before they need reapplication. The exact number depends on the DWR chemistry, the wash detergent, and the fabric construction. PFC-free DWR options may require more frequent reapplication. You can restore DWR with a spray-on or wash-in treatment available at outdoor retailers.

What water column rating do I need for a commuting jacket?

For daily commuting in urban conditions, a water column rating of 5,000 to 8,000 mm is sufficient. This handles light to moderate rain and wind. If you commute in heavy downpours, consider a higher rating or a hardshell. Remember that the DWR finish handles the initial water repellency, while the water column rating handles sustained pressure.

Conclusion

Choosing softshell fabric for jackets comes down to verifying six measurable properties: water column rating, breathability, stretch and recovery, abrasion resistance, DWR durability, and fabric weight. Each property trades off against the others, so your job is to find the right balance for your end use. A daily commuting jacket needs moderate weather protection and high comfort. An alpine shell needs maximum breathability and durability. Start with the test reports, request physical samples, and run a pilot production batch before committing to bulk. The data will guide you — but only if you ask for it. When you evaluate softshell fabric for jackets, demand the numbers, test the fabric, and choose a supplier who can document every claim.