By the My Textile Fabric Team — Los Angeles fabric wholesalers.
Part of our How to Choose Fabric for Sewing: A Beginner's Guide — start there for the full picture.
From dance floors to comic conventions to the gym, stretch fabrics are everywhere — and they behave like nothing else in your sewing room. This guide covers spandex basics, two-way versus four-way stretch, the most popular stretch fabrics (scuba, stretch velvet, power mesh), how to sew them, and how to buy them online with confidence.
What Is Spandex? The Fiber Behind the Stretch
Spandex (called elastane in Europe, and known by the brand name Lycra) is a synthetic fiber invented in the late 1950s. What makes it special is its extraordinary elasticity: it can stretch to five or more times its original length and snap back without damage. A small percentage of spandex — often just 3–5% — blended into another fiber like nylon, polyester, or cotton transforms a rigid fabric into a comfortable, moving one.
You'll see fabrics described as "nylon-spandex," "polyester-spandex," or "cotton-spandex." The first fiber is the base that gives the fabric its look and feel; the spandex is the engine that gives it recovery. For the deep dive, see The Complete Guide to Spandex Fabric: Stretch, Comfort & Style and nylon spandex, the perfect blend of flexibility and durability. Browse the stretch spandex collection, including our nylon spandex.
Two-Way vs. Four-Way Stretch
Stretch direction matters as much as stretch amount:
- Two-way (mechanical) stretch: the fabric stretches in one direction only — usually across the width. This can come from spandex or purely from the knit structure itself (called mechanical stretch). Learn more about mechanical stretch and when it's enough.
- Four-way stretch: the fabric stretches both across the width and along the length, then recovers in both directions. This is what you want for form-fitting garments that move with the body — leggings, swimwear, dancewear, superhero costumes.
Patterns designed for knits specify how much stretch is required (e.g., "50% crosswise stretch"). Test by marking two inches on the fabric's edge and stretching it — if it reaches three inches, you have 50% stretch. A general overview of stretch in textiles lives at What Is Stretch Textile? Benefits & Applications Explained, and our when to use spandex, jersey, or velvet guide helps you pick between the three.
Meet the Family: Scuba, Double Knit, and More
Scuba (neoprene-look double knit) is a thick, smooth polyester-spandex double knit that holds its shape, resists wrinkles, and gives garments a sculpted look. It's a favorite for bodycon dresses, skirts, and costumes — structured enough to skim the body without clinging. Our scuba double knit is a great place to start; read What Is Scuba Fabric? and Top 7 Scuba Fabric Sewing Patterns for project ideas.
Jersey is the classic T-shirt knit — soft, drapey, and comfortable, with moderate stretch. It's the friendliest stretch fabric for beginners. Glimmer and metallic knits add sparkle while keeping flexibilitymetallic spandex for dance costumes and athleticwear
Stretch Velvet: Glamour with Give
Stretch velvet pairs the luxurious look of velvet with a spandex backing, giving it four-way stretch and a forgiving fit. It's become the go-to for evening wear, dance costumes, and cosplay — anywhere you want rich texture that moves with you. Our stretch velvet comes in the deep, plush look costumers love; browse the full velvet collection.
A few things to know: velvet has a nap (the direction the pile lies), and every pattern piece must be cut with the nap running the same way — buy extra yardage for this. Stretch velvet forgives more fit errors than woven velvet, but it still shows needle holes, so plan your seams. For context on the velvet family, see What Is Panne Velvet?.
Power Mesh: Support, Structure, and Sheer Power
Power mesh is a strong, sheer nylon-spandex knit with firm, four-way stretch and excellent recovery. Costume makers and sewists use it where they need support and coverage without bulk: illusion necklines, bodysuit linings, dance costume bases, shapewear-style underlayers, and anywhere skin needs to show through a supportive panel. Our power mesh spandex is designed for exactly these jobs.
Because it's sheer and springy, power mesh is sewn with the same stretch techniques as spandex (covered below), and it's often used double-layered for extra support. It's a workhorse fabric that rarely gets the spotlight — but ask any costume designer and they'll tell you it's essential.
Dancewear and Athletic Wear: Fabrics Built to Move
Performance textiles for dance and athletics share one job description: move with the body, wick or tolerate sweat, and recover their shape wash after wash. Nylon-spandex and polyester-spandex blends dominate here. Nylon-based blends tend to feel softer and more opaque; polyester-based blends are often more colorfast and quicker-drying. Metallic and foiled spandex finishes add stage shine without sacrificing stretch — a staple of dance costumes and competition wear.
When sewing athletic or dance garments, opacity matters: stretch fabrics get thinner (and more see-through) when stretched. Always test-stretch your fabric over your hand in good light before cutting. Linings and power-mesh layers solve most opacity problems — browse lining fabrics for underlayers, and read metallic spandex for dance costumes and athleticwear for finish options.
Cosplay and Costumes: Stretch That Performs
Cosplay is one of the biggest consumers of stretch fabrics, and for good reason: costumes need to survive a full convention day of walking, posing, and photos while looking screen-accurate. The cosplay staples:
- Four-way stretch spandex for bodysuits, hero suits, and anything skin-tight.
- Stretch velvet for regal capes, fantasy gowns, and textured armor-adjacent looks.
- Scuba double knit for structured armor pieces, futuristic armor-adjacent panels, and clean-lined sci-fi looks.
- Power mesh for illusion panels, mask linings, and supportive bases.
Color accuracy matters hugely in cosplay — always order a swatch first, because screen colors and fabric colors rarely match by photo alone. For the full cosplay fabric playbook, see Stretch Fabrics for Costumes & Cosplay, why stretch velvet and spandex are taking over cosplay, costume couture with specialty fabrics, and where to buy costume fabric online.
Sewing Tips for Stretch Fabrics: Needles, Stitches & Presser Feet
Sewing stretch fabric rewards a few setup changes. These are general techniques used by sewists everywhere:
- Needles: use ballpoint or stretch needles. Their rounded tips slip between knit loops instead of piercing and breaking them, which prevents skipped stitches and holes.
- Stitches: a narrow zigzag, triple zigzag, or your machine's dedicated stretch/overlock stitch lets seams stretch with the fabric. Straight stitches on high-stretch seams will pop under tension. A serger is ideal but not required.
- Presser feet: a walking foot keeps layers feeding evenly and prevents the waviness ("lettuce edging") that stretch fabrics love to develop. Slightly lengthening the stitch and reducing presser-foot pressure also help.
- Cutting: let the fabric relax flat before cutting — never cut stretch fabric stretched out, or pieces will shrink back and missize. Use pattern weights instead of pins where possible, and cut single-layer if the fabric distorts.
- Hems: a twin needle gives a professional-looking stretchable hem; fusible knit interfacing on hemlines prevents tunneling.
Buying Tips: How to Shop Stretch Fabrics Online
Buying stretch fabric online takes a little extra diligence. Here's the checklist:
- Check the stretch spec. Look for the stretch percentage and direction (2-way vs. 4-way). Match it to your pattern's requirements — a pattern calling for 4-way stretch won't work in a 2-way fabric.
- Check the weight/GSM. A heavier scuba behaves nothing like a lightweight jersey; weight predicts drape, opacity, and structure.
- Read the fiber content. Nylon-spandex, polyester-spandex, and cotton-spandex each feel and perform differently — and wash differently.
- Order a swatch. Test stretch, recovery (stretch it and watch it snap back), opacity, and color. Wash-test it the way you'll wash the garment.
- Buy a little extra. Stretch fabrics distort during cutting, and nap-direction fabrics like stretch velvet need extra yardage so all pieces face the same way.
For exploring the range, browse stretch spandex, velvet, satin, sheer, and faux & imitation collections.
Caring for Performance Textiles
Stretch fibers last longer with gentle care. Machine wash cold on a gentle cycle, skip the fabric softener (it coats spandex fibers and reduces elasticity over time), and line dry or tumble dry low — high heat is the enemy of spandex recovery. Turn garments inside out to protect metallic and foiled finishes. A well-cared-for spandex blend keeps its snap for years; a heat-abused one goes baggy and never comes back.
Frequently Asked Questions
What's the difference between 2-way and 4-way stretch?
Two-way stretch fabric stretches in one direction (usually across the width); four-way stretch fabric stretches both across the width and along the length, recovering in both directions. Form-fitting garments like leggings and bodysuits need four-way stretch.
What needle should I use for stretch fabric?
Use ballpoint or stretch needles — their rounded tips slide between knit loops instead of piercing them, which prevents skipped stitches, runs, and holes in the fabric.
Can I sew stretch fabric without a serger?
Yes. A standard sewing machine with a narrow zigzag stitch or a dedicated stretch stitch handles most stretch fabrics well. A walking foot helps prevent wavy seams, and a twin needle gives stretchable, professional-looking hems.
Is scuba fabric the same as neoprene?
Not exactly. Fashion "scuba" is a polyester-spandex double knit that resembles neoprene's smooth, structured look, but it's a knit textile — softer, more breathable, and sewable on a home machine — rather than rubber-based foam neoprene.
Why does my stretch fabric go wavy when I sew it?
The presser foot is stretching the fabric as it feeds. Fixes: switch to a walking foot, reduce presser-foot pressure, lengthen the stitch slightly, and don't pull the fabric from behind as it feeds.