Quad Strap Jock System
A jock strap with four straps that hold the athletic cup snug against your body while you run, slide, skate and grapple. Wear it under your own shorts, pants or uniform.
Shift-proof quad strap design keeps the cup locked in place
Hard cup: polycarbonate shell with a soft elastomer rim
Frequently bought together
Free U.S. shipping on orders over $175. Ground, 2-Day and Overnight options at checkout.
30-day returns and free exchanges. Add Checkout+ at checkout for free returns and package protection.
Lifetime warranty on the athletic cup.
Jock size guide
Measure around your natural waist, just above the hips. Don’t go by pant size.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 120–150 lb |
| Medium | 30–32" | 140–170 lb |
| Large | 32–34" | 160–190 lb |
| X Large | 34–36" | 180–220 lb |
| 2XL | 36–40" | 210–260 lb |
| 3XL | 41–44" | 250–300 lb |
| Size | Age | Waist |
|---|---|---|
| Youth Medium | 8–10 | 22–24" |
| Youth Large | 10–12 | 24–26" |
| Youth X Large | 12–14 | 26–29" |
Made for a snug, supportive fit. Between sizes? Athletes with bigger thighs or glutes usually size up. Leaner builds may like the smaller size. Adult sizes have a drawstring waistband. Youth sizes do not. Full size chart
Cup size guide
| Cup | Length | Width | Depth |
|---|---|---|---|
| Youth | 5.5" | 3" | 2" |
| Adult | 6.75" | 4" | 2.25" |
Most athletes move to the adult cup and adult sizes around age 12, depending on build.
Description
An elite jock strap that stays in place through your toughest training sessions.
Designed for high-performance athletics, our unique 4-way jock strap locks your cup into place for guaranteed protection without sacrificing comfort. The Diamond MMA 4-way jock strap was engineered with military-grade elastics and premium quality construction to bring you the toughest jock strap on the market.
- The patent system prevents lateral and vertical movement of the cup during training
- Designed for easy cup removal and entry
- 30-day warranty on all compression shorts and jock straps
Engineered by award-winning designers and Stanford University engineers, the Diamond MMA athletic cup system has been approved by doctors and urologists as the best groin protection on the market. Our products are used by professional athletes around the world.
What’s included
Quad Strap Jock plus a High Performance Athletic Cup (adult or youth). Choose “Without Cup” for the jock only. 2pk and 3pk add extra jocks, not extra cups.
Shipping & returns
- Shipping is calculated at checkout, with Ground, 2-Day and Overnight options.
- Free shipping on U.S. orders over $175.
- Returns are accepted within 30 days of delivery, even on worn or used gear.
- Exchanges are free on every order.
- Add Checkout+ at checkout for free returns and package protection.
- Refunds go to your original payment method or store credit, your choice. Allow 5–7 business days once we receive the return.
- Shipping fees aren’t refundable once an order ships.
Compression Short with Built-in Jock & Quad Strap Jock size chart
Performance Short with Built-in Jock
Compression Brief
Performance Short with Built-in Brief
Rash Guard Size Chart
T-Shirt size chart
FUN FACT: While washing your jockstrap you can leave your athletic cup in the pouch to be cleaned at the same time! Leave both the jock and cup out to air dry.
Product details
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Description
Four straps hold the cup snug against your body. Two go around the front of your legs and two sit just below the glutes, so the cup pocket is pulled tight from four directions. Less adjusting. Fewer distractions.
The pouch is a soft nylon-spandex with flat seams, and the 2" waistband keeps it in place under shorts, pants or a uniform. Adult sizes add a drawstring.
The High Performance Athletic Cup’s polycarbonate shell and shaped geometry help deflect and spread the force of a hit, and the soft elastomer rim helps reduce rubbing.
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Materials & care
Pouch: 84% nylon, 16% spandex jersey
Straps: Four 1" military-grade elastic straps
Waistband: 2" plush knit logo elastic with drawstring (adult sizes)
Seams: Flat seams sewn with stretch thread
Cup: Polycarbonate shell with a rubber elastomer rim
Care: Machine wash cold. You can leave the cup in the jock’s pocket and air dry both, or wash the cup by hand. -
Warranty
Every Diamond MMA athletic cup has a lifetime warranty. Every other Diamond MMA product, including the jock short, has a 30-day warranty.
Problem with your gear? Fill out the Warranty Claim Form.
How does a jock strap keep a cup from shifting?
Most jock straps rely on a pouch and a couple of leg straps, which leaves the cup room to move. The Diamond MMA Quad Strap Jock has a cup pocket tailored to the Diamond MMA cup, plus four straps that pull that pocket tight from four directions. That tension helps keep the cup snug against the body when you sprint, change direction, slide or hit the mat. The athlete should be thinking about the game, not adjusting their cup.
Protective gear helps reduce risk but can’t prevent every injury.
Safety & product disclaimer
Built to stay in place through every play
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Shift-proof quad strap design
Patented four-strap stabilization helps keep the cup centered and secure, so you’re not stopping to fix it mid-game.
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Tailor-fit cup pocket
The pocket is cut to fit the Diamond MMA cup, so there’s no extra room for it to slide around.
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Hard cup protection
A polycarbonate shell with a rubber elastomer rim. The shape helps deflect and spread the force of a hit. Lifetime warranty on the cup.
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One system, every sport
Baseball, football, lacrosse, wrestling and combat sports. Adult and youth sizes, so the whole team gets the same locked-in fit.
Frequently asked questions
Which should I get: the Quad Strap Jock, Compression Jock Short or Performance Short?
All three use the same four-strap design and tailor-fit cup pocket. The difference is what’s built around the jock.
Quad Strap Jock: A traditional jock strap you wear under your own shorts, pants, or uniform.
Compression Jock Short: The Quad Strap Jock with a compression short built around it. The two front straps sit inside the short, and the two back straps are built into the short. It ends about mid-thigh.
Performance Short With Built-In Jock: Made to wear as your outer short. All four straps are inside, and it ends just above the knee.
What size jock should I get?
Measure around your natural waist, just above the hips, and match it to the size guide. Adult sizes run Small (28–30") to 3XL (41–44"). Between sizes with bigger thighs or glutes? Size up.
Should my kid wear a youth or adult cup?
The youth cup is 5.5" long, 3" wide and 2" deep. The adult cup is 6.75" long, 4" wide and 2.25" deep. Most athletes move to adult sizes around age 12, depending on build.
Can I wash the jock with the cup inside?
Yes. Machine wash the jock in cold water with the cup left in the pouch, then air dry both. You can also wash the cup by hand.
Do the 2pk and 3pk come with extra cups?
No. Multipacks add extra jock. You get one cup with the system.
How much is shipping?
Shipping is calculated at checkout, with Ground, 2-Day and Overnight options. U.S. orders over $175 ship free.
What if it doesn’t fit?
Exchanges are free, so you can swap for the right size. You can also return it within 30 days of delivery, even if you’ve worn it. Add Checkout+ at checkout for free returns and package protection.
What does the warranty cover?
The athletic cup has a lifetime warranty. Every other Diamond MMA product, including the jock short, has a 30-day warranty. Fill out the Warranty Claim Form if you have a problem.
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