Harleywrote a review of Alpinestars Faster Bike Hydration Backpack on September 27, 2018
Familiarity: I've used it several times
I bought this backpack based on Alpinestars reputation for quality because I've used their products before. But this is my first backpack from them. Size claim, not sure how to verify that. However, I do like the size for a day ride. But I can tell you for me, it can hold a full 2L bladder (Leatt), back protector, basic bike tools for flat repair, 2 tubes, compact multi-tool, mini-pump, a couple handful of snacks for a day ride, keys, cell phone, and lightweight jacket and shirt with room to spare and not over stuffing my bag. I found it comfortable to wear. Can't comment on durability since not having that long or on being waterproof since not used under such conditions. Overall, I'm happy with the purchase especially at the sale price.