I used to have a wonderfully lightweight carry bag, the Trekker Ultra Lite Stand Bag. Unfortunately the legs got inoperably broken and, sadly, these bags are no longer made. (So much for the power of the press and my glowing review). Various attempts at replacing my lost love have proved to be a case of, “You are nice, but you’re no Trekker Ultra Lite.”
The main thing I seek in a lightweight golf bag is that it is has little weight. I used a push cart for years until I joined Reigate Heath GC which has a superb heathland track, but also has several steep narrow paths which made using a trolley a challenge. So I moved over to carrying and discovered that carrying is more convenient almost everywhere, but more tiring, hence why I favor lightweight bags, the lighter the better.
