Fight2Win is the official partner and distributor of Shock Doctor in the Netherlands—from the entry-level Bio Flex SD213 to the premium Ultra SD329 and Ultrapro 337 compression shorts. For men, women, and children, across all martial arts. Read more
Below you’ll find our information guide to Shock Doctor groinguards—from model comparisons and technology to sizing advice and suitability for different sports.
Shock Doctor – the specialist in groin protection for martial arts
Shock Doctor is an American brand (Developed in USA) specializing in protective sports equipment.
Fight2Win carries the complete Shock Doctor groinguard line: from the entry-level Bio Flex SD213 to the premium Ultra SD329 (F2W choice) and the Ultrapro 337 compression shorts for men, and the G5 for women.
All Shock Doctor models stand out for innovative materials such as carbon fiber and Bio-Shape Design—and are suitable for multiple martial arts.
SD213, SD329 and Ultrapro 337 – the Shock Doctor models compared
Shock Doctor Bio Flex SD213 (plastic, S-XXL, 218 g): the entry-level model – solid basic protection for all combat sports. Available in White.
Shock Doctor Ultra SD329 (Carbon fiber, Bio-Shape Design, S-XXL, F2W choice): the best-selling Shock Doctor model in our range. Carbon fiber cup, anatomically shaped for maximum comfort.
Shock Doctor Ultrapro 337 compression shorts (Carbon fiber cup, S-XL): compression shorts with Carbon fiber groin protection – ideal for kickboxing, MMA, and Krav Maga.
Shock Doctor G5 for women (Carbon fiber, 40 g, Junior/Adult): the lightest model in our range – barely noticeable during training.
Loose cup or compression shorts – which Shock Doctor model suits your sport
Loose cup (SD213, SD329, G5 women's): worn in your own elasticated trousers or sports trousers. Versatile for all sports—easy to switch between trousers.
Compression trousers (Ultrapro 337): compression shorts combined with carbon-fiber groin protection—fits snugly and moves with you. No risk of shifting during kickboxing or MMA.
For boxing, budo and taekwondo: the loose cup (SD329) is the most practical choice.
For kickboxing, MMA and Krav Maga: Ultrapro 337 compression trousers are more comfortable.
Size Guide for Shock Doctor groinguards – from Junior to XXL
SD213 and SD329: available in S through XXL—measure your waist circumference to find the right size.
Ultrapro 337 compression pants: S through XL.
G5 women's: Junior and Adult.
Shock Doctor's wide size range makes these models suitable for both young people and adults.
Bio-Shape Design and carbon fiber—the technology behind Shock Doctor
Bio-Shape Design (SD329 Ultra): The cup is anatomically shaped based on human anatomy, providing a better fit and greater comfort than a standard round cup.
Carbon fiber (SD329, G5, Ultrapro 337): Stronger than plastic at the same weight—Shock Doctor uses carbon fiber in its premium models for maximum protection with minimal weight.
Maintaining Shock Doctor groinguards – easy to keep clean
Loose cups (SD213, SD329, G5): easy to clean with a damp cloth and mild detergent. Always air out after use.
Ultrapro 337 compression pants: follow the washing instructions on the label. Wash after every training session for optimal hygiene.
Store all Shock Doctor products in a dry, well-ventilated place. Never store them in a closed bag.
Fight2Win - official Shock Doctor partner in the Netherlands and the EU
Fight2Win is the official partner and retailer of Shock Doctor in the Netherlands.
The complete Shock Doctor groinguard range—SD213, SD329, Ultrapro 337, and G5 women’s—is in stock and available for immediate delivery.
Would you like advice on the right Shock Doctor model for your sport? Visit our showroom or contact our specialists.
Shock Doctor groinguards, available directly from stock
Shock Doctor groinguards are shipped from our own stock within 1 business day! We are the martial arts specialists and know everything about boxing gloves, kickboxing gloves, shin guards, handwraps, bag gloves, and other training equipment!
We have a huge range of Groin protectors & Groinguards for children, women, and men in stock at our showroom! Visit us for expert advice and purchase your chosen item right away.
Curious about all our premium boxing and martial arts equipment? Explore our full range of martial arts equipment in the webshop.
Frequently asked questions — Shock Doctor groinguards
Why are groinguards in boxing so different from regular cups?
A "regular" cup only protects the groin. A no-foul protector in boxing protects the kidneys, liver, and groin.
In boxing, the chance of taking punches to the liver or kidneys is much greater than in kickboxing. Extra protection is therefore needed to minimize the risk of injuries and damage.
Is a groinguard mandatory?
Yes, usually.
A groinguard is often mandatory or recommended. For boxing, kickboxing, and karate training, for example, it is recommended. In krav maga and self-defense systems, it is mandatory. The area protected by the groinguard is, of course, highly vulnerable to injury.
During exams and competitions, a groinguard is always mandatory for both men and women.
Can you wash groinguards and cups?
Yes and no.
This depends on the brand and model. You can almost never wash the cup (the hard part), nor do you need to. Most regular groinguards are built into a kind of sports brief (jockstrap). You can remove the cup and wash the brief.
The larger kidney and groinguards (No-Foul) designed for boxing obviously cannot be washed in a washing machine either. This really shouldn’t be necessary. You can simply wipe them down and dry them to keep them fresh.
Naturally, you can’t wash the steel groinguards either. The metal is not designed to withstand this.
What size groinguard should I get?
When choosing the size of groinguards, the main consideration is waist circumference rather than the cup size itself. For each groinguard, we have included a unique size chart (in the size selector and below in the product information) for that specific brand and model.
Shock Doctor has grown from the undisputed leader in mouthguard technology into the world's leading innovator in sports protection. Our belief in combining design and technology to achieve better protection and performance is now trusted by fearless athletes across a growing range of products and sports, from youth to amateur to professional.
In addition to mouthguards, Shock Doctor is also at the forefront of protecting crucial and vital areas of the body. They make the best athletic cups and groinguards for men and women. These are used in intense combat sports, such as boxing and kickboxing, as well as in other contact sports, such as ice hockey, field hockey, and rugby!
9,5 - Excellent from 1100+ reviews
Groinguard Shock Doctor Ultra SD329
Compression trousers groinguard Shock Doctor Core Bioflex €39,50 /Limited stockFight2Win ChoiceDeveloped in USABioflex Cup
Groinguard Shock Doctor Bio Flex SD213 €24,50 /In stockFight2Win ChoiceDeveloped in USABioflex Cup
