Welcome!

Actually, I believe your "catch" is actually a benefit. The new synthetic bags are comparable to down bags in wrmth, weight, and compressability. The big advantages of synthetic bags are the ability to provide warmth when wet and the ease of cleaning them.

I have a synthetic 20 degree bag that is slightly over 2 lb. Unfortunately, the model is no longer made.

I can't give you any specific recommendations, but most "name" brands make good stythetic bags.

I highly recommend the new generation of Primaloft insulation. I have a jacket that is insulated with it and it is amazing.

My older bag uses an older generation of Primaloft, and it has more than lived up to my expectations.

Good luck in you search.