Spats and grappling tights have become standard kit for no-gi training, worn under shorts for mat protection, hygiene and a secure second-skin fit. For brands, small decisions in fabric, fit and seam placement decide whether a pair lasts a season or splits in the first month. This guide covers what buyers should understand before specifying spats for production.
What Spats Are Used For
Grapplers wear spats to reduce mat burn on the knees and shins, keep muscles warm and provide a barrier layer that is more hygienic than bare skin on shared mats. Many athletes also prefer the light compression and the way tights stay in place compared with loose leggings.
For a brand, spats are a natural companion to rash guards and grappling shorts, and a matching set gives your range a coordinated look academies like to buy for their teams.
Fabric Blends: Polyester, Nylon and Elastane
Most grappling tights are knitted from polyester or nylon blended with elastane, often called spandex or Lycra. Polyester is colourfast and prints brilliantly, which makes it the default for sublimated designs. Nylon feels softer and more premium but can be less forgiving with bright printed artwork.
The elastane percentage drives stretch and recovery. Too little and the tights bag out at the knee; too much and they feel restrictive and can turn sheer under tension. Judge the balance on a sample, not a fabric swatch.
Fabric Weight and the Opacity Test
Fabric weight, measured in GSM, controls both durability and modesty. Lightweight knits feel fast and cool but risk going transparent at the seat and knee when stretched, which is the single most common complaint buyers have with cheap spats.
During sampling, stretch the fabric under bright light and have a tester squat and bridge in them. A midweight fabric with good recovery should stay fully opaque through both.
Four-Way Stretch and Recovery
Four-way stretch means the fabric extends both across and along its length, following the leg through shots, guard work and scrambles. Two-way stretch fabrics restrict the squat and pull at the waistband, so they are rarely suitable for grappling.
Fit: Compression vs Regular
Spats are sold in two broad fits. Compression fits hug tightly and are marketed around muscle support and a locked-in feel. Regular or comfort fits are slightly easier through the thigh and are often preferred for long training days and beginners.
A useful fit checklist when you assess samples:
- The waistband sits at the natural waist without rolling during takedown drills
- There is no pulling or transparency across the seat in a deep squat
- The ankle grip stays in place without cutting into the calf
- Knees bend fully with no resistance from the fabric
- Seams track the leg cleanly without twisting after movement
Waistband Design That Stays Put
The waistband is the most common failure point in grappling tights. A wide elastic band, enclosed in fabric, grips far better than a narrow band or a simple folded hem. Many designs add an internal drawstring as a second line of security.
Position matters too: a waistband that sits too low gets dragged down by shorts during sparring, so test samples under your usual grappling shorts and roll a few rounds before judging the fit.
Flatlock Seams and Seam Durability
Flatlock stitching is the standard for quality spats. The seam lies flat against the skin, so there is no raised ridge to chafe during mat work, and the interlocking thread structure spreads load across a wider area than a basic overlock seam.
The inseam and the back rise seam take the most punishment. At FORM FIGHT, seam allowances and stitch density on these panels are specified for grappling loads, and samples are stress-tested by pulling the seams firmly in both directions before a style is approved for bulk.
Reinforced Panels and Gussets
A diamond or triangular gusset at the crotch removes the four-way seam intersection that splits on lesser tights, and gives the fabric room to move in deep positions. It is a small pattern addition that dramatically improves the life of the garment.
Knee panels are another option for heavy training ranges: a second layer over the knee extends wear where fabric drags across the mat most.
Sublimation Printing and Branding
Spats are usually fully sublimated, meaning the artwork is dyed into the polyester so it cannot crack, peel or fade with stretching. Leg panels give a long canvas for brand marks, academy crests and gradient designs.
Care, Washing and Longevity
Elastane degrades with heat, so care labels should advise cool washing and air drying. Grapplers wash kit after every session, so your fabric and stitching are tested hundreds of times a year.
During development, wash test samples repeatedly and re-check the stretch recovery and seam strength afterwards. A pair that feels perfect new but loses recovery after twenty washes will damage a young brand’s reputation quickly.
Specifying Spats for Your Brand
A clear specification covers fabric blend and weight, fit type, waistband build, seam type, gusset design and artwork placement. Factories in Sialkot produce much of the world’s grappling apparel, and a precise spec keeps your second order identical to your first.
FORM FIGHT develops spats as part of its wider custom fightwear range, so tights, rash guards and shorts can share fabrics and artwork. Our manufacturing process page explains how a design moves from sample to finished production.
Conclusion
Good spats come down to three things: a fabric with genuine four-way stretch and recovery, a fit checked under real training conditions, and flatlock seams reinforced where grappling loads concentrate. If you test those three areas honestly at sample stage, durability problems rarely appear later.
When you are ready to develop tights for your academy or label, send your artwork and fit preferences through our request a quote page and FORM FIGHT will prepare a specification you can sample with confidence.
FAQs
What fabric is best for grappling spats?
A polyester or nylon blend with elastane is standard, with polyester preferred for sublimated designs because it holds colour and print sharply.
Why do some spats go see-through?
The fabric is too light or stretched beyond its recovery range, most often at the seat and knees, which is why opacity should be tested in a deep squat.
What is a flatlock seam?
It is a seam stitched so both sides lie flat against the skin, reducing chafing and spreading stress, which makes it ideal for grappling clothing.
Should spats have a drawstring?
A wide elastic waistband works for most athletes, but an internal drawstring adds security and is worth including for competition-focused designs.
