Bryan T.wrote a review of Evoc FR Trail Blackline Protector Hydration Pack on December 4, 2015
Familiarity: I've used it several times
This pack was a great idea. I needed a little more space than a 10 liter Camelbak with back protection for Mammoth Mountain. The organization is great it feels comfortable.
I used it for a 29.9 mile/3,030 vertical foot xc race and The Kamikaze Enduro Race on Mammoth Mountain. I never thought it was too heavy or large for either events. However, I do have set the waist band tight to keep it from slidding up.