How do you pack even lighter stuff. I'm surprised at how much dri fit clothes, underwear, socks etc weigh in a 30L bag. What are the best lightweght stuff?

I try to buy the lightest stuff and even have a tiny Gaan charger, all my shorts, shirts, are dri fit type. Granted my bag is Synik 30 it's middle of road for weight.

Granted I have a electric shaver which weights a decent amount, honestly think packing cubes weigh more than they are worth.

Saving 10-20g, doesn't seem much but if you have 20 things that are 15g less it adds up