There are two advantages of making outerwear 3L:
1) The third layer allows for greatly improved breathability.
2) There is no need for a lining so the jackets can be substantially lighter.
Saga uses a nylon mesh liner in their "3L" outerwear which completely negates any amount of weight savings or improved breathability that this construction usually provides. Their "3L" line is much more accurately comparable to our Wolfgang and Johann outerwear.
Our 3L line is some of the highest quality outerwear I have seen on the market today. I would put it up against any arcteryx/Patagonia/TNF ect  piece any day. We have a better fit and better customer service than any other company making a comparable piece quality wise. This is by far and away the best outerwear we have ever produced.
Feel free to post up any more questions, I would be happy to address any concerns you may have!
-Sam
Also we have a great return policy on the off chance that it doesn't work out.