GSM stands for "Grams per Square Meter," which is a unit of measurement used to describe the weight and thickness of fabric. In the context o
f plain polo T-shirts, a high GSM value typically indicates a heavier, thicker fabric, while a low GSM value means a lighter, thinner fabric.
For example, a plain polo T-shirt with a GSM value of 200 would be considered heavy and dense, while one with a GSM value of 150 would be lighter and more breathable. The exact GSM value of a T-shirt can affect its draping, durability, and overall feel, so it's an important factor to consider when choosing a T-shirt, especially for specific purposes like outdoor activities or athletic wear.