Traveling light! How to make 7kg backpack for 3 weeks trip!

  I’m heading to 3 weeks trip for Kenya and Netherlands. I have stop over here in Bangkok,right now. I usually traveling very light stuffs. That’s the same this time as I use LCC flights. I made 11 kg backpack for 3 weeks.  Sometimes people ask me how it makes. Well,maybe because I do laundry…