All of our rash guards follow the same size chart. Please find your waist size below to select the best fit. 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. Please find your waist size below to select the best fit. 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 195lbs |
| XXL | 185lbs to 230lbs |
| XXXL | 230lbs 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. Please find your waist size below to select the best fit. 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 195lbs |
| XXL | 185lbs to 230lbs |
| XXXL | 230lbs 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. Match with your belt rank, choose from short or long sleeve. Approved for IBJJF competition.
Ships Today from San Diego • Free Returns
Pair with our Fight Shorts and a base layer of Spats or Compression Shorts for the ultimate No-Gi uniform.
We use buttery smooth flatlock stitching that doesn't itch and irritate.
Slightly extended cut means that your rash guard won't ride up while you roll.
Ventilated mesh armpit vents allow you to get through the toughest training rounds without overheating.
Sublimated graphics won't fade or peel as you roll or wash your rash guard.
Backed by the Gold BJJ Guarantee: if you don't love your Foundation Rashguard, let us know and we'll replace or refund your order.
Competition rules require that you wear a rash guard with at least 10% of your belt rank.
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.
United States United StatesAwesome purchase. Quality construction, and the vented under arms help keep me cool while rolling. Easily my favorite rash guard now. I originally ordered a medium, and as many others have said, the sizing is off. That being said, the customer service was amazing. I sized up to a large and all is well. Could’ve maybe went XL, but the L works.
Absolutely fantastic products and customer service. I have returned for more gear and will continue.
United StatesI love this rash guard. Air vents under the arms, felt great. That being said, the sizing, as others have said. Is way off. I’m 160 lbs 5’9” athletic build, and the M was very, very tight. Sizing up to the large to see if it’s the right fit. Customer service was awesome though, and it’s cool that they give you the option to keep it for a teammate, and give you a 50% code for a replacement.
United StatesI am not your average size jiu jit su athlete (6'3", 290 lbs). It is not always the easiest finding gear that fits comfortably let alone that carryy size. That's has not been the case with Gold. I started with Gold buying spats. They fit so comfortably that moved to rash guards and shorts.Now I don't know if I'll got to another brand. I may not be sponsored but I don't know if you'll catch me at classes or competing or training in another brand. I'm here for the journey.
