There are those out there who prefer a higher pile for wax removal than the suggested 300-400GSM. So within this higher pile category are towels that are perfect for coating buffing and wax removal; 500-600GSM. Not everyone does a 2-step coating wipe of leveling followed by buffing, but for those who do this range of GSM is the way to go.
For example, some low quality microfiber materials can produce high GSM readings, but only because they utilize a thicker "base layer" of 100% polyester, changing the towel's microfiber content and producing a less absorbent product overall.
When asking questions about the quality of a microfiber material, we need to be concerned with its manufacturing process, especially in regards to its surface yarn. Most microfiber material is made by weaving surface yarn through a base layer. The surface yarn is arranged to make the pile that you see and feel on the surface of the towel.
It is possible to make less expensive and lower quality towels that feel heavier and weigh more (higher GSM) by using a thicker base layer yarn.
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