In fact, 70 grams and 80 grams mentioned here refer to a non-woven fabric per square meter, and its weight is 70 grams or 80 grams.
Therefore, their differences are easy to see: under the same conditions, the heavier the fabric, the better its quality (such as the ability to withstand weight), this is their main difference.
However, this means that 80 grams of fabric is definitely more expensive than 70 grams of fabric, after all, the cost is higher
