Diamond MMA Learning Center
Groin Protection 101
Your guide to athletic cups, jock systems, sizing and fit for baseball, hockey, football, lacrosse, wrestling and combat sports.
Short version: wear an athletic cup in a jock that holds it snug, sized to the athlete. Everything below explains why.
Explore topics
New to groin protection? Start here
How to Choose an Athletic Cup and JockstrapCup size, jock style and what your sport calls for, in one guide.Read the guide →
Soft Cup vs. Hard Cup: Why It MattersWhat each one does, and when you need a hard cup.Read the guide →
A Parent's Guide to Youth Athletic CupsSizing, fit and when to move up, for every youth sport.Read the guide →
Watch and learn
Why Premium Groin Protection Matters
How strong is Diamond MMA? The basics of groin protection.
Athletic Cup vs. Complete Protection System
Why a cup alone isn't enough, and how our patented system works.
How Should an Athletic Cup Fit?
How to fit and wear your gear for protection and comfort.
Why protection systems matter
The Cup
A polycarbonate shell whose geometry helps deflect and spread the force of a hit.
The Support
A jock or compression short holds the cup in place against your body.
Shift-Proof Design
Our patented quad strap design keeps the cup snug, so you can focus on the game.
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Most popular questions
How do I pick the right cup size?
Check the size chart or take the quiz and we'll point you to the right size.
What's the difference between a hard cup and a soft cup?
A hard cup has a polycarbonate shell built to deflect and spread the force of a hit. A soft cup is padding: more give, but much less impact protection. For contact sports and sports with a hard ball or puck, choose a hard cup.
How should an athletic cup fit?
It should cover everything, sit flat against your body and stay put when you run or squat. The jock should feel snug without pinching.
When should a youth athlete move up to an adult cup?
Most athletes move from the youth cup to the adult cup around ages 14 to 15, depending on body type. If the youth cup no longer covers everything, it's time to size up.
Can I wear a cup with your compression briefs?
No. Our briefs have no cup pocket. They're supportive briefs for days you don't need a cup.
Latest articles
Inside the Brewers' Lucky Cups: Custom Painted Athletic Cups by Diamond MMAOct 23, 2026Read more →
Tanner Boser Puts Groin Protection in the Spotlight at UFC EdmontonOct 19, 2026Read more →
The Full-Athlete Gear Check: A Parent's Guide to Youth Athletic CupsOct 13, 2026Read more →
Still have questions?
Our team is here to help. Email info@diamondmma.com or call 888-959-1662.