I've always used regular hydration packs for exercise and they are always too long for my short torso and bounce around when I move or run. I bought this to use when I ride my gravel bike and it works great. The extra room around the bladder and the shoulder strap storage are great for snacks, my iphone mini and some spare parts. I did a little jogging in it and it stays in place well but have not tested it on longer runs, not sure if it will have chafing issues but it worked perfect for hiking and biking so far.
This pack is amazing. Stealthy, the bladder is soft against your back, phone fits nicely, snacks easy to access. Could use a little more expandable outside storage, but I’ve used this pack daily and really like it. Cut the hose short to sit on one side near the holder. Ace bag , just like all their other stuff!! Xoxo