• It's a 25 version

• The velcro field isn't sown on (yet). It's currently tacked on with this stuff. I use it often and depending on the material you're sticking it to, it's fairly reliable without needing to stitch. Unless you're running the gear pretty hard

• The water bottle pocket is the most intrusive outer pocket to the main cavity, but it's not bad. With a 32 oz. Nalgene though, I think it'd be a tight fit. It will definitely fit in the front lower compartment though, without taking up much of the main space. // [Some reference photos I just found on the TB forum about it, but I'm not sure if that's a Synapse 19 or a 25]

Not that you asked—but if I was looking to buy a TB backpack right now, I'd get the Synik 30, for the improvements and slightly extra space.