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What Does GSM Mean in BJJ Gi’s: Breaking Down Fabric Weight and Quality

GSM stands for Grams per Square Meter. GSM measures the weight of gi fabric and affects various aspects of BJJ gis. Gis with a higher GSM are typically more durable but heavier, while lower GSM gis are lighter.

The range of GSM in Brazilian jiu jitsu gis varies widely, typically between 375 and 890 GSM.

However, the IBJJF (International Brazilian jiu jitsu Federation) requires that all competitors gi’s weigh between 380 and 650 GSM.

Heavier gis are harder to grab, but lightweight gis are more comfortable.

Understanding GSM in BJJ Gis Plus Examples

Again, GSM stands for Grams per Square Meter. It helps quantify the weight of the gi fabric, giving you a general idea of the material’s density and thickness.

The GSM of a BJJ gi influences several factors:

  • Training: Higher GSM gi’s tend to be harder to grip
  • Durability: Higher GSM fabrics tend to be more resilient against wear and tear.
  • Comfort: A higher GSM can mean a rougher texture, while a lower GSM may feel lighter and softer.

Most BJJ gis fall within the GSM range of 375 to 890, which correlates with different types of weaves, such as single or double. They present a balance between durability and user comfort.

It should also be noted that Judo gis are typically much higher GSM than BJJ gis.

Here’s a basic GSM classification:

  • Lightweight: Less than 450 GSM
  • Middleweight: 450-550 GSM
  • Heavyweight: More than 550 GSM

Some examples of different brands and their most popular gis with varying GSM:

BrandTypical GSM Range
Gold BJJ Aerowave Gi275 GSM
Venum Contender 2.0350 GSM
FUJI Suparaito350 GSM
Hayabusa Lightweight Gi420 GSM
FUJI All-Around GI550 GSM
Tatami550 GSM

Factors Affecting GSM Value

GSM, or grams per square meter, is a crucial metric in determining the characteristics of a BJJ Gi’s fabric. It influences durability, comfort, and suitability for various activities within Brazilian Jiu-Jitsu.

Material Composition

The fabric of a BJJ Gi is traditionally made from cotton, which contributes to the GSM value. High-quality cotton can increase the GSM due to its density and the way it is woven. Different blends involving cotton or other materials also affect the GSM, with some lighter materials creating a lower GSM and heavier materials resulting in a higher GSM.

Weave Type

A significant factor influencing GSM is the type of weave employed. Here are common weave types and their general GSM ranges:

  • Single Weave: Lighter, usually from 350 to 450 GSM
  • Pearl Weave: Versatile, often ranging between 450 to 550 GSM
  • Gold Weave: More substantial without being too heavy, typically 550 to 650 GSM
  • Double Weave: Thicker and heavier, generally above 650 GSM

Each weave type balances weight, strength, and breathability differently, contributing to the Gi’s GSM value.

Care and Maintenance of High GSM Gis

High GSM (grams per square meter) Gis are favored by many Brazilian Jiu-Jitsu practitioners for their durability and longevity. However, the heavyweight fabric of these Gis also requires proper care and maintenance to ensure they retain their quality and comfort. Here are several recommendations for taking care of high GSM Gis:

  • Washing: It is important to wash the Gi after every training session to prevent the buildup of bacteria and odors. Use cold water and a gentle, bleach-free detergent to maintain fabric integrity. High GSM Gis should be turned inside out before washing to protect the outer fabric.
  • Drying: The heavy fabric of high GSM Gis means they will take longer to dry. Air drying is the most recommended method. Avoid the use of a tumble dryer as the intense heat can cause the Gi to shrink and deteriorate in quality.
  • Shrinking: If the Gi needs shrinkage for a better fit, one should carefully monitor during the initial washes. Controlled short cycles in a tumble dryer on low heat can be used, checking periodically to ensure the desired fit is achieved without over-shrinking.
  • Storage: Store the Gi in a cool, dry place away from direct sunlight to prevent fading. Hanging the Gi on a wide hanger helps maintain the shape and prevents creases.

Frequently Asked Questions

How does GSM influence the weight and feel of a BJJ gi?

The GSM rating directly correlates with the heft and density of a gi. A higher GSM means a thicker, potentially more durable gi, while a lower GSM results in a lighter, more breathable one.

What are the differences between various GSM ratings like 450, 550, and 750 in BJJ gis?

A 450 GSM gi is typically lighter and good for daily training. A 550 GSM gi strikes a balance between durability and comfort. Conversely, a 750 GSM gi is much heavier, usually only seen in a handful of bjj gis. Many more judo gis will be in that heavier GSM range.

Which GSM rating is considered best for durability in BJJ gi fabrics?

Generally, higher GSM fabrics, such as those above 550 GSM, are considered better for durability. They can withstand rigorous training and frequent washing.

What is the significance of pearl weave in BJJ gis and how is it related to GSM?

Pearl weave pertains to the pattern of the fabric weave. It is popular due to its durability and light weight, and it typically comes in various GSM ratings, allowing for different weights and strengths.

How does the GSM of a BJJ gi affect its performance and comfort during training?

A higher GSM can provide more material strength, which may offer better performance in terms of withstanding grips and pulls. On the flip side, a lower GSM enhances comfort by creating a lighter gi that allows for easier movement and can help fighters avoid overheating.

Can the GSM rating of a BJJ gi indicate its suitability for different climates or seasons?

Yes, gis with a lower GSM are more suitable for hot climates or summer training as they are lighter and more breathable. Heavier gis with a higher GSM are better for colder environments, providing more warmth.