The universal kit
- Fitted athletic top — rash guard if you own one, snug tee if not. Loose shirts tangle fingers and collect knees.
- Pocketless bottoms — board shorts without zippers/pockets, or leggings/spats. Pockets catch toes; it is the most preventable injury in the room.
- Flip flops — the mat is barefoot-only and the bathroom floor is not. Shoes-to-mat-edge, sandals everywhere else, is the hygiene contract of every academy on earth.
- Water, towel, trimmed nails — the last one is real etiquette, not a suggestion; nails are tiny knives in a scramble.
- Nothing metal, nothing dangling — jewelry, watches, piercings out or taped.
Gi class without a gi
Call ahead: most academies run trials in athletic wear or keep loaner gis (wash-worn but functional). Take the loaner without embarrassment, everyone started in one. Hold off buying until you know you are staying, then size it properly with the gi size calculator instead of guessing at a sporting-goods store.
The impression that actually matters
Nobody is evaluating your athleticism on day one; the room IS quietly noting hygiene and coachability. Show up clean, nails short, on time, ask where to line up, and say the honest sentence "I'm brand new, what should I do?" That sentence has started ten thousand good BJJ careers. What happens in the class itself is covered in BJJ for beginners.
Later purchases, in order of actual need: your own gi (if staying), mouthguard (before hard rolling), rash guard and spats (skin protection: see why), and much, much later, everything else the gear industry would like to sell you.