BJJ Gi Care & Maintenance: How to Wash, Dry, and Extend the Life of Your Kimono

A BJJ gi endures sweat, friction, blood, and hundreds of grips per session. Without proper care, it shrinks, stiffens, develops permanent odour, and loses the structural integrity that keeps collar chokes tight and lapel guards functional. This guide covers everything you need to know to keep your kimono in competition shape.

Wash After Every Single Session

This is non-negotiable. Bacteria begin multiplying within minutes of you stepping off the mat. Staph infections, ringworm, and impetigo are real risks in grappling — and a dirty gi is the number one transmission vector. If you train twice a day, you need two gis (minimum) so one is always clean.

Wash in cold water (30°C / 86°F or below). Hot water shrinks cotton, weakens the pearl weave, and sets stains. Use a regular amount of detergent — double-dosing doesn't clean better and leaves residue that traps bacteria.

Dealing With Stains and Odour

For blood stains, rinse immediately with cold water before the blood sets. Hydrogen peroxide (3%) applied directly to the stain works on white gis. For coloured gis, use an enzyme-based stain remover.

If your gi smells even after washing, it has bacteria embedded in the fibres. Soak it for 30 minutes in a solution of one cup white vinegar per gallon of cold water, then wash as normal. For stubborn cases, add half a cup of baking soda to the wash cycle. Never use bleach on coloured gis — it weakens the fabric and causes uneven fading.

Drying Your Gi

Hang dry whenever possible. The dryer is the single biggest cause of gi shrinkage. If you must use a dryer, use the lowest heat setting and remove the gi while it's still slightly damp. A gi that goes through a hot dryer cycle can shrink a full size.

Hang your gi on a wide hanger or lay it flat on a drying rack. Avoid direct sunlight for extended periods — UV exposure fades colours and weakens cotton over time. Indoor air drying with good ventilation is ideal.

Preventing Shrinkage

Pre-shrunk gis still shrink if exposed to heat. The rules are simple: cold wash, no hot dryer, and never iron on high heat. If your gi is slightly too large, one controlled warm wash can bring it down, but this is a one-way street — you can't un-shrink a gi.

When buying a new gi, check the manufacturer's shrinkage estimate. Most quality gis shrink 2-5% in length and width even with proper care. Factor this into your sizing decision.

Storage

Never leave a wet gi in your gym bag. This is how gis develop mildew and permanent stink. If you can't wash immediately, hang it to air dry as soon as you get home, then wash before your next session.

Store clean, dry gis folded or hung in a ventilated space. Cedar blocks or moisture absorbers in your gear bag help prevent musty smells between sessions.

When to Replace Your Gi

A well-maintained gi lasts 1-3 years of regular training (3-5 sessions per week). Signs it's time for a replacement: collar is permanently stretched and floppy (can't hold a cross choke), knee fabric is tissue-thin, seams are pulling apart at stress points, or the gi fails competition inspection for tears or missing patches.

Rotate between 2-3 gis to extend the life of each one. This also ensures you always have a clean gi ready for training.