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Online BJJ Gi shopping is a minefield.

The product photos look great. The description says "competition grade." The reviews seem solid. Then the box arrives and the collar is stiff as a board in the wrong way, the sleeves are already borderline short, and the logo is screen-printed — which means it'll be peeling off by month two.

At Bolton, we've spent 18 years on the manufacturing side. We know exactly what corners get cut, what specs get faked, and what red flags buyers miss because they don't know what to look for. Here are the 7 things you must verify before placing a BJJ Gi order online — whether you're buying one for yourself or 500 for your brand.

1. Does It List the Exact GSM?

This is the single fastest quality filter available to any online buyer.

GSM (Grams per Square Meter) is the objective measure of fabric density. A manufacturer confident in their product will list it clearly. A manufacturer cutting corners will hide behind vague terms like "heavyweight," "competition grade," or "ultra-durable" — with no number attached.

What the numbers mean:

• 450–550 GSM for the jacket (pearl weave): Competition-ready. Dense enough for grip resistance, balanced enough for movement.
• 250–280 GSM for the pants (ripstop): The industry standard for durability without dead weight.
• Below 350 GSM jacket: Fine for casual training, but won't hold up under competition pressure or daily hard rolling.

If the listing doesn't give you a GSM number, ask. If they can't answer, move on.

2. Is It Pre-Shrunk — and Can They Prove It?

Shrinkage is the number one hidden defect in budget BJJ Gis. A Gi that hasn't been pre-shrunk at the factory can shrink 3–7% after your first wash. On a size A2, that's the difference between a Gi that fits and one that fails IBJJF sleeve inspection.

What to look for:

• The listing should explicitly state "pre-shrunk" — not just "shrink-resistant."
• For bulk orders, ask your manufacturer for shrinkage test data. At Bolton, our pearl weave Gis are controlled to a ±1% shrinkage tolerance — a spec we can back up with production data.
• If a brand can't tell you their shrinkage rate, that's your answer.

3. What Type of Weave Is It — and Is It Appropriate for Your Use Case?

Not all weaves are created equal, and the right choice depends on how and where you train.

• Pearl weave: The competition standard. Dense, durable, grip-resistant. Runs 450–550 GSM for the jacket. Expect a 5–10 wash break-in period before it softens fully.
• Single weave: Lighter and more affordable. Good for beginners and casual training, but less durable under competition stress.
• Double weave: Extremely durable but heavy. Less common in modern competition Gis because of weight limit concerns.
• Ripstop pants: The correct pairing for any quality pearl weave jacket. 250–280 GSM, tear-resistant grid construction, faster drying than cotton twill.

If a listing describes the jacket as "pearl weave" but doesn't specify the pant fabric separately — ask. Pants and jackets should always be specced independently.