A no-gi outfit usually pairs a fitted rash guard with grappling shorts, compression shorts or spats. For IBJJF competition, the rash guard must cover the torso to the shorts waistband and meet the stated material and color requirements; shorts also have construction and length rules. Use the rules for your event and each garment's size chart before buying.
No-gi apparel has two jobs: fit the training style and match the event rules if you compete. A rash guard, shorts and spats have different sizing and fabric decisions, so compare each garment separately.
Compare the main pieces
| Garment | Fit and use | Competition check |
|---|---|---|
| Rash guard | Elastic top with short or long sleeves | IBJJF requires skin-tight elastic material that covers the torso to the shorts waistband and uses permitted colors |
| Grappling shorts | Board-style short, typically with no open pockets | IBJJF sets color, length, pocket, closure and material rules |
| Spats | Full-length compression pants | Check whether the division and event allow them and which colors apply |
| Compression shorts | Fitted base layer beneath shorts | Verify the event’s colors and whether the layer is allowed for the division |
Check IBJJF uniform requirements
The current IBJJF uniform page says rash guards for no-gi divisions must use elastic, skin-tight material, cover the torso to the shorts waistband and meet the color and rank-color requirement. The page permits black, white or black-and-white shirts with at least 10% of the athlete’s rank color; shirts entirely in the rank color are also permitted.
For men’s shorts, IBJJF lists permitted colors, coverage of at least halfway down the thigh and a maximum length at the knee. Pockets must be absent or stitched completely shut; buttons, exposed drawstrings, zippers and plastic or metal are not allowed. Check the current page for women’s divisions and any event-specific updates before ordering.
Choose fabric and fit
Use the garment’s own size chart and compare the measurements with a piece of apparel that fits well. Rash guards are designed to sit close to the body; shorts should allow the movement your gym expects without hardware or loose elements that conflict with the rules. Compare seam placement, sleeve length, waistband construction and the maker’s wash instructions.
For competition, a garment’s “IBJJF” label or collection name is not a replacement for checking the governing body’s current requirements. Confirm the exact design, color and division rules before taking it to an event.
Build an outfit by training use
| Training setup | Pieces to compare |
|---|---|
| Everyday no-gi class | Rash guard and gym-approved shorts |
| Competition | Rule-compliant rash guard, shorts and permitted base layer |
| Cold gym | Long-sleeve rash guard and optional compression layer, if allowed |
| Shared mat space | Multiple sets and care instructions for frequent washing |
Related: BJJ gi sizing guide, home grappling mats, boxing mouthguard guide, and Muay Thai shin guards. Visit the BJJ and grappling hub.
Sources
Common questions
What should I wear for no-gi BJJ?
For practice, check your gym's dress code; common pieces are a rash guard and grappling shorts or spats. Competition rules can specify colors, coverage and construction.
Does an IBJJF rash guard have to be tight?
IBJJF requires an elastic, skin-tight shirt long enough to cover the torso to the shorts waistband, with permitted colors and rank-color requirements.
Can no-gi shorts have pockets?
IBJJF rules prohibit pockets unless they are completely stitched shut; buttons, exposed drawstrings, zippers and plastic or metal are also restricted.
Can you wear spats under BJJ shorts?
IBJJF permits elastic compression shorts under men's no-gi shorts in the listed colors. Check the exact rules for your division and event.