How to Pick the Best MMA Compression Fight Shorts

Most MMA fight shorts are built for the gym. Grappling, wrestling, and daily sparring ask for more than that. The right pair of MMA compression shorts comes down to four things: fabric weight, fit, construction, and how you actually train.

Trevor Wittman, 3X MMA Coach of the Year and founder of ONX Sports, has a simple standard for gear: it should support performance without becoming a distraction. That standard, tested through daily training at ONX Labs, is what this guide is built on.

Match the Shorts to How You Train

There is no single best pair of shorts, only the right pair for your discipline.

Grappling (no-gi, BJJ, wrestling): Standalone compression shorts work as a second skin. They prevent mat burn and don't give an opponent loose fabric to grab. Extra material around the legs is a liability on the mat, not a feature.

Mixed training and striking: Many fighters run hybrid shorts, a compression liner paired with a lightweight outer shell. You get the coverage of fight shorts with the support of compression underneath.

Daily volume training: If you're training five or six days a week, fabric weight matters more than style. Standard compression gear breaks down fast under that kind of load.

Check the Fabric Weight, Not Just the Fabric

Most compression shorts on the market run 180 to 220 GSM, grams per square meter, a measure of fabric density. Fine for the gym. Not enough for daily grappling.

Heavier fabric, closer to 300 GSM, holds its shape longer, resists abrasion better, and stays opaque round after round instead of going see-through after a few wash cycles. If a product page doesn't list a GSM number at all, assume it's on the lighter end and act accordingly.

Fabric weight aside, check the blend. Polyester handles moisture-wicking and holds color over time. Spandex gives the stretch and shape recovery that keeps shorts from sagging by the end of a session. You also want 4-way stretch, so the fabric moves in every direction without pulling at the seams during kicks, takedowns, and ground work.

Skip heavy cotton and thin, low-grade polyester. Both trap heat and get heavier as they soak up sweat, which slows you down right when you need to move fastest.

Get the Waistband and Seams Right

A wide, secure elastic waistband is non-negotiable. It has to sit in place through a double-leg takedown and stay there when you're flat on your back scrambling for position.

Skip velcro closures for grappling. They scratch training partners and shred rashguards on contact, and an internal drawstring under an elastic band gives you the same adjustability without the risk.

Seams are where cheap shorts fail first. Flatlock stitching keeps seams flat against the skin so they don't chew up your legs during heavy, repeated movement. Reinforced stitching at the inseam and the waistband join keeps the shorts from blowing out mid-round.

Skip Anything That Can Catch

The features that look useful on a rack cause problems on the mat.

• Zippers: They can cut skin and catch fingers during scrambles.
• Pockets: Even a flat pocket adds bulk that a training partner can grab or that catches on a limb.
• Metal hardware: Snaps, buckles, and metal drawstring tips scratch and can injure.
• Excess length or loose fabric: Anything past mid-thigh gives an opponent more material to grip and control.

Get the Sizing Right

MMA compression shorts should fit like a second skin: form-fitting, never digging into your waist or leg seams. If the waistband leaves marks or the leg openings ride up when you move, size up.

A few checks that matter more than they seem:

• Mid-thigh length is the standard for a reason. Shorter hems can ride up during ground work; longer hems catch on the knee during kicks and transitions.
• Shorts should stay put through a shot for a takedown or a scramble from guard. If they slip or bunch, they're either too big or made from fabric too light to hold shape under load.
• Always check the brand's specific size chart. Sizing varies enough between brands that going by feel alone leads to returns. See the ONX sizing guide before you order.

Built at 300 GSM: The ONX Premium MMA Compression Fight Shorts

ONX built its compression fight shorts around that fabric weight gap. The ONX Premium MMA Compression Fight Shorts run at 300 GSM, well above the standard 180 to 220 GSM range, in a 72% polyester, 28% spandex blend. That weight difference shows up in a few specific ways:

• More structure and opacity. The shorts hold their shape and stay fully opaque through daily training, not just a few sessions.
• Medium-high compression fit. Built for muscle stabilization through MMA, BJJ, wrestling, and grappling, not general fitness.
• 4-way stretch mobility. Full range of motion for kicks, takedowns, and ground work without restriction.
• Anti-ride leg construction. Stays in place through rolling and high-output training.
• Flatlock stitching and reinforced seams. Minimizes chafing and holds up at the high-stress points.
• High abrasion resistance. Built for daily training volume, not occasional wear.

They're available in Black, Grey, and White at $69, and Black RWB at $79, in sizes S through XXL. The fabric is also sublimation-ready, which makes it a fit for teams and gyms building custom fight kits.

More support. More durability. More structure. That's the difference 300 GSM makes.

FAQ

What should I look for when buying MMA fight shorts?
A heavyweight, 4-way stretch fabric, a secure elastic waistband without metal hardware, flatlock stitching, and no zippers or pockets. If you plan to spar, add a built-in cup pocket to the list. For grappling, a snug compression fit reduces the amount of loose fabric an opponent can grab.

Are MMA compression shorts better than standard fight shorts for grappling?
For no-gi grappling and BJJ, yes. MMA compression shorts fit like a second skin, which prevents mat burn and removes the loose fabric that gets caught in limbs or gi grips. Fighters who train mixed disciplines often layer compression shorts under a looser outer short instead of picking one or the other.

What size MMA compression shorts should I buy?
Go by the brand's specific size chart, not your regular shorts size. Fit varies enough between brands that guessing leads to returns. The shorts should be form-fitting without digging into your waist or leg seams, and mid-thigh length is standard, so the hem doesn't restrict hip mobility or catch on the knee.

Can I wear compression shorts under my regular fight shorts?
Yes, and plenty of fighters do. A compression layer underneath adds muscle support, cuts down on chafing, and gives you extra coverage if your outer shorts shift during a scramble. Just make sure it's heavyweight enough to hold its shape after repeated washes, not a thin liner that stretches out after a few sessions.