Martial Arts Clothing: what Claude and GPT would buy
Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.
Claude and GPT choose the same product: Fuji All Around BJJ Gi
In Clothing, Shoes & Jewelry, Claude and GPT choose the same brand in 21 of 70 categories.
Claude Opus 5.5 · October 27, 2026
Fuji All Around BJJ Gi (line)
A durable, competition-legal pearl-weave gi that is the usual starter recommendation for Brazilian jiu-jitsu, which is the most demanding use most buyers in this category have.
Not for: Karate, taekwondo or judo students, whose schools and federations expect a different cut and weave, and no-gi grapplers who need a rash guard and shorts instead.
GPT 6.1 Sol · November 10, 2026
FUJI All Around BJJ Gi (line)
A durable, straightforward Brazilian jiu-jitsu gi with reinforced construction, suitable for regular training without unnecessary extras.
Not for: Karate, taekwondo, or no-gi training.
Which one fits you
karate or general dojo beginner uniform
Century Martial Arts Middleweight Student Uniform (line)
An inexpensive, widely stocked student uniform that is heavier than thin costume gis and suits the first year of striking-art training.
Not for: Grapplers, because the fabric and lapel are not built to be gripped and pulled.
judo
Fuji Single Weave Judo Gi (line)
A single-weave judo gi has the looser cut and longer skirt judo grips need, at a weight that is comfortable for club training.
Not for: Judoka entering IJF-sanctioned events, who need an IJF-approved double-weave gi.
Muay Thai and kickboxing
Fairtex (brand)
Fairtex Muay Thai shorts have the short, split-leg cut that frees the knees and hips for kicks and clinch work.
Not for: Grapplers, whose limbs catch in the wide leg openings.
no-gi grappling
Hayabusa (brand)
Hayabusa rash guards have flatlock seams and a snug fit that stays in place during scrambles and protects skin from mat burn.
Not for: Anyone training in a gi-required class or a striking art, where a rash guard is optional at most.
Check before you buy
Where to find Fuji All Around BJJ Gi
- Fuji Sports
- jiujitsu.com
- Shogun Supplies
Shops seen in search results on November 5, 2026. A shop missing here may sell it too. Nothing was checked by a person.
Brands that matter
- Fuji: Reliable, widely available BJJ and judo gis at a beginner-friendly level.
- Century Martial Arts: Common supplier of karate and taekwondo student uniforms and belts.
- Tatami Fightwear: Popular BJJ gis and rash guards with competitive-legal cuts.
- Hayabusa: Premium rash guards, fight shorts and gis.
- Fairtex: Established Thai brand for Muay Thai shorts and training gear.
- Venum: Widely sold fightwear, including rash guards, shorts and gis.
- Mizuno: Long-standing judo gi maker with competition-grade options.
- Adidas: Makes taekwondo doboks and judo gis, including federation-oriented models.
What to avoid
- Thin polycotton costume-grade gis for any grappling art; they tear quickly.
- Using a karate or taekwondo uniform for BJJ or judo.
- Gis in colors other than white, blue or black if you plan to compete in IBJJF events.
- Tumble-drying a cotton gi on high heat; wash cold and hang dry.
- Loose, baggy-leg shorts for grappling, which catch fingers and toes.
Questions
Can I wear a karate gi to a BJJ or judo class?
Not for long. Karate uniforms are thinner and cut looser, with lightweight lapels that rip when gripped. Grappling gis use heavier weaves and reinforced collars.
Does a belt come with the gi?
Karate and taekwondo student uniforms often include a white belt. BJJ and judo gis usually do not, so buy the belt separately in your rank color.
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