All of our rash guards follow the same size chart. Our rash guards are designed to fit tight. If you're not sure about the best size or would like a looser fit, please size up.
All of our rash guards follow the same size chart. Our rash guards are designed to fit tight. If you're not sure about the best size or would like a looser fit, please size up.
| Size | Weight |
| XS | 95lbs to 115lbs |
| S | 105lbs to 130lbs |
| M | 125lbs to 165lbs |
| L | 155lbs to 175lbs |
| XL | 170lbs to 200lbs |
| 2XL | 185lbs to 230lbs |
| 3XL | 220lbs to 250lbs |
| 4XL | 250lbs and up |
Not sure if you're choosing the right size? We get it, Jiu Jitsu gear sizing can be tricky. That's why we offer totally free pre-paid returns.
$39.99 Size Guide
All of our rash guards follow the same size chart. Our rash guards are designed to fit tight. If you're not sure about the best size or would like a looser fit, please size up.
| Size | Weight |
| XS | 95lbs to 115lbs |
| S | 105lbs to 130lbs |
| M | 125lbs to 165lbs |
| L | 155lbs to 175lbs |
| XL | 170lbs to 200lbs |
| 2XL | 185lbs to 230lbs |
| 3XL | 220lbs to 250lbs |
| 4XL | 250lbs and up |
Not sure if you're choosing the right size? We get it, Jiu Jitsu gear sizing can be tricky. That's why we offer totally free pre-paid returns.
Our flagship ranked Jiu Jitsu rash guard. Trusted by over 250,000 Jiu Jitsu athletes.
Match with your belt rank (white, black, and red colors are commonly worn at all belt levels). Fully legal for IBJJF competition.
Ships Today from San Diego • Free Returns
Our rash guards are battle tested across the highest level training rooms in the world. They perform when it counts, and look good while doing so.
Features include:
Look good, feel good. Feel good, roll good.
Whether it's ADCC, CJI, or the IBJJF World Championships, you're sure to see the Foundation Rash Guard on a podium.
We've been making rash guards for nearly 10 years now, and we're darn good at it.
Join over 250,000 athletes that put their trust in our Foundation Rash Guard.
IBJJF competition rules require you to wear a rash guard that features at least 10% of your belt rank color.
Don't get DQ'd for wearing an illegal uniform! Our Foundation Rash Guard has been specifically designed to meet all Jiu Jitsu tournament requirements.
