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.
We proudly back all of our products by the Gold BJJ Guarantee.
If for any reason you're not thrilled with your purchase, we'll replace or refund your order no-questions-asked.
United StatesSolid buy. Quality material and so comfortable to roll in. The underarm ventilation designs is a game changer.
United States United Statesa bit small woud order one size up but great rash guard overall
United StatesFit was excellent, quality gear, and excellent customer service. Highly recommend.
United States