All of the towels I use are the culmination of many years of trial and error. As I'm sure you know, microfiber towels aren't cheap. I'd be ashamed if I actually added up how much I spent to get to this point. I know I can save you a lot of time, energy, and money by giving you access to buy exactly what I'm using on my cars.
This has been the longest standing towel in my current arsenal. You wouldn't think of this type of towel for windows, but it works better than the dozens of others I've tried. Waffle weave stands the least chance of lintiing and isn't as grabby as other glass specific towels. Trust me on this one. It's legit. I use with Griot's Glass Cleaner.
Number I have in my cabinet: 20.
Note: Since I buy in such volume, I'm able to get all of us better pricing than you'd get on your own. I sell these towels at the same price that you would pay if you bought them in bulk 25+.
400 GSM: This is the weight per square meter of material. The weight does not necessarily mean the thickness.