ROLL HARD Kids Brazilian Jiu Jitsu Kimonos Black Brazilian Jiu Jitsu Gi/ Kimono. Traditional style KIDS Jiu Jitsu Gi/Kimono, strong lightweight single weave. Traditional BJJ Cut. Thick collar. This gi design features an injected foam mold collar that makes the jacket lighter, keeps the inside of the collar dry, strong, and more resistant to mildew. Manufactured with comfort and durability in mind