Build quality, stay heights to fit my torso, the lumbar/harness padding, fit, waist belt, and how it carries weight for me. The only thing I didn’t initially like with exo was the weight and bags seemed a little “busy” - that’s totally changed as I have used the system more and more. Just look at the website and how detailed they explain every little decision and approach to the packs - there’s a video for everything. It’s all just done so well.As a guy who is in the SG camp but is Exo curious, what do you prefer about the K4 vs the X-Curve system?
One other thing I prefer: supporting Exo vs what was a grassroots brand, now being ruined by multiple company sales/hand changes. I had an SG pack when they still sold them through Schnees. With their main people gone, so am I.