Softshell fabric is a stretchy, breathable outerwear material designed to block wind and resist light rain while letting body heat and sweat escape. It sits between a fleece and a waterproof hardshell jacket in terms of protection, making it one of the most versatile fabrics for active outdoor use. Most softshells use a multi-layer construction that combines a weather-resistant outer face, an optional waterproof membrane, and a soft inner lining into a single piece of fabric.
How Softshell Fabric Is Constructed
Softshell fabric typically uses a three-layer design bonded together so it feels like one material. The outer layer is treated with a water-repellent finish that causes rain and snow to bead up and roll off. The middle layer, when present, is a thin membrane that blocks water from soaking through while still allowing moisture vapor from sweat to pass outward. The inner layer is usually a brushed fleece or jersey knit that sits comfortably against your skin and adds a small amount of insulation.
Not every softshell includes all three layers. Simpler two-layer versions skip the membrane entirely, relying on the tightly woven outer fabric and water-repellent coating alone to handle light weather. These tend to be more breathable and stretchy but less protective in sustained rain. Three-layer versions with a full membrane offer stronger water resistance at the cost of some airflow.
The fibers themselves are almost always synthetic. Most softshells blend polyester or nylon with a small percentage of elastane (the same stretchy fiber in athletic wear), typically between 3% and 10%. The elastane gives the fabric its signature four-way stretch, so the jacket moves with you during climbing, skiing, or hiking without restricting your arms or shoulders. Polyester and nylon provide durability, quick drying, and lightweight structure.
What Makes It Different From a Hardshell
The key distinction is the tradeoff between waterproofing and breathability. A hardshell jacket is fully waterproof and designed for heavy, sustained rain. But that level of waterproofing limits how much sweat vapor can escape, which means you can overheat quickly during intense activity. Softshell fabric flips that priority: it handles light rain and wind well but lets far more moisture escape from the inside.
Breathability in outdoor fabrics is measured by how many grams of moisture vapor can pass through a square meter of fabric in 24 hours. A rating of 10,000 g/m²/24h is considered very breathable. The best-performing fabrics reach around 40,000 g/m²/24h. Softshells generally land in the higher end of this range because their construction is less sealed off than a hardshell’s. Some softshell membranes carry ratings like 7,000 g/m² for breathability alongside a waterproof rating of 10,000 mm, which means they handle moderate weather while still venting sweat effectively.
Softshells are also noticeably quieter and more flexible than hardshells. Hardshell fabrics tend to be stiff and crinkly, while softshell fabric drapes and stretches more like a thick athletic shirt. This matters during activities where freedom of movement is important or where noise would be a nuisance.
Best Activities for Softshell Fabric
Softshell fabric works best during high-output activities in cold, dry, or breezy conditions where you’re generating a lot of body heat and sweat. Winter hiking, ski touring, snowshoeing, alpine climbing, and fastpacking are all classic use cases. The fabric sheds sweat efficiently, blocks wind better than a standard fleece, and stretches with your body during sustained uphill effort.
The sweet spot is cold weather without heavy precipitation. On a breezy winter day with light flurries, a softshell jacket over a base layer keeps you comfortable during the climb without the clammy, overheated feeling a hardshell would create. If conditions worsen, you can layer a lightweight waterproof shell over the softshell for full rain protection while keeping the breathability and warmth underneath. This layering approach lets you fine-tune your warmth and protection throughout the day without committing to a single heavy jacket.
Where softshell fabric falls short is in prolonged, heavy rain. The water-repellent finish will hold off light showers for a while, but it will eventually soak through if the rain is sustained and heavy. For those conditions, a hardshell is the better choice.
Water Repellency and How to Maintain It
The water-beading behavior on a softshell’s outer face comes from a durable water repellent (DWR) coating applied during manufacturing. This is a chemical treatment on the surface of the fabric, separate from any internal membrane. Over time, dirt, body oils, detergent residue, and abrasion wear down the DWR, causing water to soak into the outer layer instead of beading off. When this happens, the jacket feels wet and heavy even if the membrane underneath is still blocking water from reaching your skin.
Restoring the DWR is straightforward. Machine wash the jacket following its care label instructions to remove dirt and oils. Then tumble dry it on a warm, gentle cycle. Once it’s fully dry, run it through the dryer for an additional 20 minutes. The heat reactivates the DWR coating and restores the water-beading effect. If you don’t have a dryer, you can iron the dry jacket on a low, warm setting with no steam, placing a towel between the iron and the fabric. This heat step is the part most people skip, and it makes a significant difference.
Newer softshell fabrics increasingly use PFC-free DWR finishes. Traditional DWR coatings relied on per- and polyfluorinated chemicals, which persist in the environment and accumulate in water systems. PFC-free alternatives, like Bionic-Finish Eco, deliver similar water-beading performance without those environmental concerns. If you’re buying a new softshell jacket, check whether it uses a fluorine-free DWR.
Choosing the Right Softshell
Softshell jackets and pants vary widely depending on how much weather protection they prioritize versus breathability and stretch. Lighter, membrane-free softshells are best for high-intensity aerobic activities in dry cold, where maximum breathability matters most. Heavier three-layer versions with membranes work better for moderate activity in wetter, windier conditions where you need more protection but still want to avoid the stiffness and heat buildup of a hardshell.
Thickness also varies. Some softshells have a substantial fleece lining that provides real warmth on its own, while others are thin enough to layer under a hardshell or over a midweight fleece. If you run warm or plan to use the jacket during intense climbing or skiing, a thinner, more breathable version will serve you better. If you want a single jacket for casual cold-weather use that doesn’t require much layering, a thicker fleece-lined softshell provides more standalone warmth.
Pay attention to the stretch. A good softshell should have noticeable four-way stretch when you pull on the fabric. This comes from the elastane content and is one of the main reasons to choose a softshell over other outerwear options. If the fabric feels stiff or only stretches in one direction, it won’t deliver the freedom of movement that makes softshell fabric worth using.