Quick Definition
Fight shorts are the shorts worn in mixed martial arts training and competition, built with stretch panels or side slits, a secure waistband, and no pockets or exposed hardware so they hold up to kicking, grappling, and takedowns.
What are fight shorts?
The shorts are purpose-built for mixed martial arts, cut and reinforced for kicking, wrestling, and ground fighting rather than everyday exercise. Under the sport’s Unified Rules, they’re the only clothing a male competitor is permitted to wear in the cage besides gloves; women add a fitted rash guard or sports bra.
That single rule shapes the whole design. A standard pair uses stretch fabric such as a polyester-spandex blend, side slits or a four-way stretch panel at the inner thigh, and a wide elastic waistband with an internal drawstring and a Velcro flap over the top.
None of it is decorative. The slits let a fighter throw a high kick without the fabric binding, reinforced seams survive being grabbed mid-scramble, and the waistband has to stay in place through a takedown.
What separates fight shorts from ordinary athletic or board shorts is what they don’t have: no pockets, no zippers, no metal fasteners, nothing an opponent’s finger or toe can catch on.
Fight shorts vs. board shorts
Regular board shorts and MMA fight shorts look similar at a glance, and the mix-up is common enough that plenty of beginners train in an old pair of board shorts before switching over. The two aren’t built the same way.
| Feature | Fight shorts | Board shorts |
|---|---|---|
| Closure | Velcro flap over an internal drawstring | Lace-up tie, often with a button |
| Length | Sits above the knee | Extends to or past the knee |
| Stretch | Side slits or four-way stretch panels | Little to no stretch |
| Hardware | No zippers, buttons, or exposed metal | Zip pockets, buttons, and metal snaps are common |
Board shorts were designed for surfing, not grappling. The longer hem restricts high kicks, and a button or zip pocket gives an opponent’s fingers or toes something to catch during a scramble. Fight shorts trace their construction straight back to board shorts, just stripped of anything that doesn’t survive a takedown.
Types of fight shorts
Not every pair fits the same way. The cut usually comes down to whether a fighter leans toward striking or grappling.
| Type | Fit | Best suited for |
|---|---|---|
| Gladiator / high-split shorts | Loose, mid-thigh, deep side slits | Striking-heavy training, high kicks |
| Vale Tudo / compression shorts | Tight, skin-hugging, spandex blend | Grappling, wrestling, No-Gi |
| Hybrid / combat shorts | Shorter and more fitted than board shorts, looser than Vale Tudo | Fighters who mix striking and grappling evenly |
The Vale Tudo name comes from Brazil’s early, largely rules-free “Vale Tudo” fights, Portuguese for “anything goes,” which fed directly into the sport that became modern MMA. UFC fighter Jon Jones is widely credited with popularizing the high-split style after wearing an early pair in the Octagon.
Fight shorts vs. Muay Thai shorts
A wide elastic waistband with no drawstring is usually the fastest way to spot Muay Thai shorts next to a pair of MMA fight shorts. Both use high side slits for kicking, but the closures and fabric diverge because the sports do too.
Muay Thai shorts are cut even shorter, made from lightweight satin or polyester. That works fine in a discipline built around striking and clinch work, where nobody is trying to pull the shorts off a fighter mid-round.
MMA adds wrestling and ground fighting to the mix, so fight shorts trade the satin for tougher polyester-spandex blends and swap the plain elastic band for a drawstring-and-Velcro combination that won’t come loose during a takedown.
Competition rules for fight shorts
Fight shorts aren’t just a style choice at the competitive level. Under the Unified Rules of Mixed Martial Arts, the ruleset most state athletic commissions and the UFC follow, shorts must sit above the knee. Pockets and zippers are out entirely, and any Velcro has to sit flush rather than exposed, where it could catch a finger or scratch an opponent.
Commissions typically approve board shorts, biking shorts, Vale Tudo shorts, and kickboxing-style shorts. Speedo-style shorts are explicitly banned.
The UFC’s own outfitting policy narrows that further: fighters are limited to Vale Tudo or board-short styles, with no bikini-style shorts permitted for women.
Amateur organizations tend to add their own layer of restrictions on top. The International Mixed Martial Arts Federation prohibits grip panels and any external lace-up waistband, requiring the drawstring to sit inside the waistband instead of on top of it.
Frequently Asked Questions
Can you wear board shorts to MMA training?
Regular board shorts work for casual training, but the longer hem and hardware like buttons or zip pockets can restrict kicks and catch on a grappling partner, which is why most gyms recommend dedicated fight shorts.
Why don’t fight shorts have pockets?
Pockets, zippers, and other hardware create something an opponent’s fingers or toes can catch on during grappling, which is why the Unified Rules of MMA ban them from competition shorts.
What’s the difference between Vale Tudo shorts and compression shorts?
In MMA, the terms are largely interchangeable. “Vale Tudo shorts” refers to the tight, skin-hugging style that traces back to Brazil’s early Vale Tudo fights, while “compression shorts” describes the same fit by its function.
Can women wear any style of fight shorts in the UFC?
No. The UFC’s outfitting policy limits women to Vale Tudo or board-short styles and specifically excludes bikini-style shorts.
What length should fight shorts be?
Under the Unified Rules, fight shorts must sit above the knee. Styles that extend below the knee aren’t permitted in sanctioned competition.
Sources
- Wikipedia. “Mixed martial arts clothing.” Accessed September 2026.
https://en.wikipedia.org/wiki/Mixed_martial_arts_clothing - Wikipedia. “Vale Tudo.” Accessed September 2026.
https://en.wikipedia.org/wiki/Vale_Tudo - MMA Ailm. “MMA Equipment Rules Explained (Gloves, Hand Wraps, Attire & Safety).” Accessed September 2026.
https://mmaailm.ee/en/mma-equipment-rules-explained/ - Epic Sports. “MMA Uniform Rules.” Accessed September 2026.
https://mma.epicsports.com/mma-uniform-rules.html - Kickincombat. “Safety and Regulations for MMA Shorts.” Accessed September 2026.
https://kickincombat.com/blogs/product-guide/safety-and-regulations-for-mma-shorts - Bleacher Report. “UFC and Reebok: A Detailed Look at the UFC’s New Athlete Outfitting Policy.” Accessed September 2026.
https://bleacherreport.com/articles/2330479-ufc-and-reebok-a-detailed-look-at-the-ufcs-new-athlete-outfitting-policy - BattleReady Fightwear. “What’s the Difference Between Vale Tudo Shorts and High Split Shorts?” Accessed September 2026.
https://brfightwear.com/en-us/blogs/news/whats-the-difference-between-vale-tudo-shorts-and-high-split-mma-shorts
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