I had high hopes for this pack that were quickly crushed. The stretchy band and chest strap bounce when running and do not feel secure. The zippers stick, and the entire pack feels cheaply made. This is now in my garbage waiting for trash pickup since it's outside the return window.

I've been looking at upgrading my Orange Mud single barrel hydration pack for years, and I'm very glad I chose the Fitly Sub90! It's comfortable, fits well against my body with minimal to no movement, and has the soft bladder for 16 oz. The pockets are intentionally designed to carry gear, with ease of access, protection, and a secure fit. I had a question shortly after I got it and called the company number. It rang twice and was answered directly by a person who turned out to be one of the owners/developers! Overall, a high quality and excellently designed running hydration pack for up to half marathon training!

I have been running for decades, averaging between 10 to 30 miles per week. I have been looking for a good hydration vest for years. This meets all of my criteria. I bought the vest in December 2024 and one of the seams on the bladder split during the middle of a run. I contacted Fitly and got a response the next day from a real person. The next day he asked me to confirm my physical address, and a replacement bladder was on the way with tracking. They picked up the replacement cost and the shipping costs. I am really impressed, having never experienced this level of customer service from any online retailer. Bravo Fitly!

I debated heavily on whether or not the Sub90 Running Hydration Vest was worth the 0. After just a single run, I can say that it absolutely is. It only holds around 15 ounces of water, but that's perfect for relatively short runs. The bag didn't bounce at all, I couldn't feel or hear the water sloshing around, and I honestly almost completely forgot that I was wearing it. The bag even came with a little warning whistle which I thought was a very nice surprise!

I've used this on a few 10+ mile long runs to try and hone in on keeping hydrated in the warmer months. This pack helps me carry plenty of water and a lot along with me in both the pack itself and the front pockets. The fit itself is something you'll need to figure out for your own body. When I figured out how exactly to set the straps, my next run was a lot nicer and I felt them much less. Would definitely recommend this to friends who need to train for longer distances.

This backpack is lightweight, it stays in place, the magnetic harness clip is weirdly effective at keeping it on and also super convenient for taking off quickly. The bladder is definitely small and not meant for super long runs. The pockets in the front are perfect for chapstick, energy chews, airpods, keys. There's also a whistle which I just think is super thoughtful. When I contacted customer service about a piece I accidentally broke they were extremely helpful and even fun to work with. Officially a fan of this company.

I love this bag for my hour+ runs. Unlike fanny packs I've tried, there is no bounce. I can fit: 17oz soft water bottle, cell phone, external cell phone battery, and keys with room to spare. I frequently wore bare chested without any chafing. I am a skinny 6'1 170lb male with no muscle to speak of and the M-L-XL was comfortably snug.

What a great running pack! It's not too big, it's not too small. I used to use a belt style for jogging/power walks, but have found they bounce around too much. This Sub90 is the perfect size. The belt and the pack both stay put without being restrictive, and there's no chafing. The box includes the backpack, a mini whistle, the 500mL flask and drinking hose. There was also a coupon for 20% off another Fitly purchase. I emailed Fitly to inquire about a replacement hose and they not only helped practically the same day, but had a replacement in my hands ASAP. Highly recommend the Sub90 and the company!