Originally, when I ordered my Ego, I forgot to upgrade prior to checkout and received the Basic Shoulder Strap with my great bag. When I visited the Seattle Factory Showroom this August I bought the Absolute Shoulder Strap (original).
I must say, that the first time I lifted the bag after quickly installing the new strap, I felt the difference on my shoulder. It does not feel like I have a twenty pound bag hanging from my left shoulder. The new strap makes it possible to carry more gear.”